-us

Learned borrowing from Latin -us.

-us m

1. (taxonomy) Used to form taxonomic names.

The Esperanto suffixes -as, -is, -os, and -us are related and appear to have been inspired by previous language projects:

This play of vowels is not an original idea of Zamenhof's: -as, -is, -os are found for the three tenses of the infinitive in Faiguet's system of 1765; -a, -i, -o without a consonant are used like Z's -as, -is, -os by Rudelle (1858); Courtonne in 1885 had -am, -im, -om in the same values, and the similarity with Esperanto is here even more perfect than in the other projects, as -um corresponds to Z's -us. —An International Language (1928)

In addition, the u of -us is likely to be related to -u.

• Audio:

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-us

1. Ending of the conditional in verbs.

A merger of Proto-Finnic *-us (in the first sense) and Proto-Finnic *-uc (in the second sense). Cognate with Finnish -us.

-us (genitive -use, partitive -ust)

1. Derives nouns from verbs.

   armastama "to love" → armastus "love"

   võistlema "to compete" → võistlus "competition"

   joonistama "to draw" → joonistus "a drawing"

2. Derives nouns from adjectives.

   aus "honest" → ausus "honesty"

   pikk "long" → pikkus "length"

Declension of -us (ÕS type 11/harjutus, no gradation)
		singular	plural
nominative		-us	-used
accusative	nom.
	gen.	-use
genitive			-uste
partitive		-ust	-usi
illative		-usse -usesse	-ustesse -usisse
inessive		-uses	-ustes -usis
elative		-usest	-ustest -usist
allative		-usele	-ustele -usile
adessive		-usel	-ustel -usil
ablative		-uselt	-ustelt -usilt
translative		-useks	-usteks -usiks
terminative		-useni	-usteni
essive		-usena	-ustena
abessive		-useta	-usteta
comitative		-usega	-ustega

Declension of -us (ÕS type 9/katus, no gradation)
		singular	plural
nominative		-us	-used
accusative	nom.
	gen.	-use
genitive			-uste
partitive		-ust	-useid
illative		-usesse	-ustesse -useisse
inessive		-uses	-ustes -useis
elative		-usest	-ustest -useist
allative		-usele	-ustele -useile
adessive		-usel	-ustel -useil
ablative		-uselt	-ustelt -useilt
translative		-useks	-usteks -useiks
terminative		-useni	-usteni
essive		-usena	-ustena
abessive		-useta	-usteta
comitative		-usega	-ustega

From Proto-Finnic *-us, generalized from -s-derivatives of u-stem verbs (e.g. ihastua → ihastus, menestyä → menestys). Compare -os.

-us (front vowel harmony variant -ys, linguistic notation -Us)

1. Forms nouns from verbs, describing an action or event.

   ‎kuvata (“to describe”) + ‎-us → ‎kuvaus (“description”)

   ‎pakata (“to pack”) + ‎-us → ‎pakkaus (“package”)

   ‎ylentää (“to promote”) + ‎-us → ‎ylennys (“promotion”)

   ‎hälyttää (“to alarm”) + ‎-us → ‎hälytys (“alarm”)

• With -ahtaa (momentane) verbs, the final -ht- may disappear entirely (through *-AhdUs > *-AhUs (regular loss in e.g. eastern dialects) > *-AUs). This has led to -AUs (-aus/-äys) becoming its own pseudo-suffix. Often both variants, one with -AhdUs and one with -AUs, exist in parallel.

Inflection of -us (Kotus type 39/vastaus, no gradation)
nominative		-us	-ukset
genitive		-uksen	-usten -uksien
partitive		-usta	-uksia
illative		-ukseen	-uksiin
		singular	plural
nominative		-us	-ukset
accusative	nom.	-us	-ukset
	gen.	-uksen
genitive		-uksen	-usten -uksien
partitive		-usta	-uksia
inessive		-uksessa	-uksissa
elative		-uksesta	-uksista
illative		-ukseen	-uksiin
adessive		-uksella	-uksilla
ablative		-ukselta	-uksilta
allative		-ukselle	-uksille
essive		-uksena	-uksina
translative		-ukseksi	-uksiksi
abessive		-uksetta	-uksitta
instructive		—	-uksin
comitative		See the possessive forms below.

Possessive forms of -us (Kotus type 39/vastaus, no gradation)

first-person singular possessor singular plural nominative -ukseni -ukseni accusative nom. -ukseni -ukseni gen. -ukseni genitive -ukseni -usteni -uksieni partitive -ustani -uksiani inessive -uksessani -uksissani elative -uksestani -uksistani illative -ukseeni -uksiini adessive -uksellani -uksillani ablative -ukseltani -uksiltani allative -ukselleni -uksilleni essive -uksenani -uksinani translative -uksekseni -uksikseni abessive -uksettani -uksittani instructive — — comitative — -uksineni second-person singular possessor singular plural nominative -uksesi -uksesi accusative nom. -uksesi -uksesi gen. -uksesi genitive -uksesi -ustesi -uksiesi partitive -ustasi -uksiasi inessive -uksessasi -uksissasi elative -uksestasi -uksistasi illative -ukseesi -uksiisi adessive -uksellasi -uksillasi ablative -ukseltasi -uksiltasi allative -uksellesi -uksillesi essive -uksenasi -uksinasi translative -ukseksesi -uksiksesi abessive -uksettasi -uksittasi instructive — — comitative — -uksinesi first-person plural possessor singular plural nominative -uksemme -uksemme accusative nom. -uksemme -uksemme gen. -uksemme genitive -uksemme -ustemme -uksiemme partitive -ustamme -uksiamme inessive -uksessamme -uksissamme elative -uksestamme -uksistamme illative -ukseemme -uksiimme adessive -uksellamme -uksillamme ablative -ukseltamme -uksiltamme allative -uksellemme -uksillemme essive -uksenamme -uksinamme translative -ukseksemme -uksiksemme abessive -uksettamme -uksittamme instructive — — comitative — -uksinemme second-person plural possessor singular plural nominative -uksenne -uksenne accusative nom. -uksenne -uksenne gen. -uksenne genitive -uksenne -ustenne -uksienne partitive -ustanne -uksianne inessive -uksessanne -uksissanne elative -uksestanne -uksistanne illative -ukseenne -uksiinne adessive -uksellanne -uksillanne ablative -ukseltanne -uksiltanne allative -uksellenne -uksillenne essive -uksenanne -uksinanne translative -ukseksenne -uksiksenne abessive -uksettanne -uksittanne instructive — — comitative — -uksinenne third-person possessor singular plural nominative -uksensa -uksensa accusative nom. -uksensa -uksensa gen. -uksensa genitive -uksensa -ustensa -uksiensa partitive -ustaan -ustansa -uksiaan -uksiansa inessive -uksessaan -uksessansa -uksissaan -uksissansa elative -uksestaan -uksestansa -uksistaan -uksistansa illative -ukseensa -uksiinsa adessive -uksellaan -uksellansa -uksillaan -uksillansa ablative -ukseltaan -ukseltansa -uksiltaan -uksiltansa allative -ukselleen -uksellensa -uksilleen -uksillensa essive -uksenaan -uksenansa -uksinaan -uksinansa translative -uksekseen -ukseksensa -uksikseen -uksiksensa abessive -uksettaan -uksettansa -uksittaan -uksittansa instructive — — comitative — -uksineen -uksinensa

• -tus (used with the verb types rohkaista (66) and valita (69))

• -mus (used with the verb types sallia (61), and in some cases, sanoa (52) and muistaa (53))

From Proto-Finnic *-us. Probably generalized from -s-derivatives of u-stem nominals (e.g. etu- → edus, palvelu → palvelus), or through the loss of a plain u-derivative from the standard language (e.g. keski- → dial. kesku- → keskus), and thus identical to etymology 1. In some cases potentially by confusion with -uus, -us (etymology 3). Alternatively from Proto-Uralic *-wikse.

-us (front vowel harmony variant -ys, linguistic notation -Us)

1. Forms nouns, indicating resemblance or association.

   ‎kanta (“base”) + ‎-us → ‎kannus (“spur”)

   ‎sormi (“finger”) + ‎-us → ‎sormus (“ring”)

   ‎vasta- (“counter-”) + ‎-us → ‎vastus (“resistance, opposition”)

   ‎kehä (“circle, ring”) + ‎-us → ‎kehys (“frame”)

   ‎syli (“bosom, lap”) + ‎-us → ‎sylys (“armful”)

   ‎typerä (“stupid”) + ‎-us → ‎typerys (“fool”)

Inflection of -us (Kotus type 39/vastaus, no gradation)
nominative		-us	-ukset
genitive		-uksen	-usten -uksien
partitive		-usta	-uksia
illative		-ukseen	-uksiin
		singular	plural
nominative		-us	-ukset
accusative	nom.	-us	-ukset
	gen.	-uksen
genitive		-uksen	-usten -uksien
partitive		-usta	-uksia
inessive		-uksessa	-uksissa
elative		-uksesta	-uksista
illative		-ukseen	-uksiin
adessive		-uksella	-uksilla
ablative		-ukselta	-uksilta
allative		-ukselle	-uksille
essive		-uksena	-uksina
translative		-ukseksi	-uksiksi
abessive		-uksetta	-uksitta
instructive		—	-uksin
comitative		See the possessive forms below.

Possessive forms of -us (Kotus type 39/vastaus, no gradation)

first-person singular possessor singular plural nominative -ukseni -ukseni accusative nom. -ukseni -ukseni gen. -ukseni genitive -ukseni -usteni -uksieni partitive -ustani -uksiani inessive -uksessani -uksissani elative -uksestani -uksistani illative -ukseeni -uksiini adessive -uksellani -uksillani ablative -ukseltani -uksiltani allative -ukselleni -uksilleni essive -uksenani -uksinani translative -uksekseni -uksikseni abessive -uksettani -uksittani instructive — — comitative — -uksineni second-person singular possessor singular plural nominative -uksesi -uksesi accusative nom. -uksesi -uksesi gen. -uksesi genitive -uksesi -ustesi -uksiesi partitive -ustasi -uksiasi inessive -uksessasi -uksissasi elative -uksestasi -uksistasi illative -ukseesi -uksiisi adessive -uksellasi -uksillasi ablative -ukseltasi -uksiltasi allative -uksellesi -uksillesi essive -uksenasi -uksinasi translative -ukseksesi -uksiksesi abessive -uksettasi -uksittasi instructive — — comitative — -uksinesi first-person plural possessor singular plural nominative -uksemme -uksemme accusative nom. -uksemme -uksemme gen. -uksemme genitive -uksemme -ustemme -uksiemme partitive -ustamme -uksiamme inessive -uksessamme -uksissamme elative -uksestamme -uksistamme illative -ukseemme -uksiimme adessive -uksellamme -uksillamme ablative -ukseltamme -uksiltamme allative -uksellemme -uksillemme essive -uksenamme -uksinamme translative -ukseksemme -uksiksemme abessive -uksettamme -uksittamme instructive — — comitative — -uksinemme second-person plural possessor singular plural nominative -uksenne -uksenne accusative nom. -uksenne -uksenne gen. -uksenne genitive -uksenne -ustenne -uksienne partitive -ustanne -uksianne inessive -uksessanne -uksissanne elative -uksestanne -uksistanne illative -ukseenne -uksiinne adessive -uksellanne -uksillanne ablative -ukseltanne -uksiltanne allative -uksellenne -uksillenne essive -uksenanne -uksinanne translative -ukseksenne -uksiksenne abessive -uksettanne -uksittanne instructive — — comitative — -uksinenne third-person possessor singular plural nominative -uksensa -uksensa accusative nom. -uksensa -uksensa gen. -uksensa genitive -uksensa -ustensa -uksiensa partitive -ustaan -ustansa -uksiaan -uksiansa inessive -uksessaan -uksessansa -uksissaan -uksissansa elative -uksestaan -uksestansa -uksistaan -uksistansa illative -ukseensa -uksiinsa adessive -uksellaan -uksellansa -uksillaan -uksillansa ablative -ukseltaan -ukseltansa -uksiltaan -uksiltansa allative -ukselleen -uksellensa -uksilleen -uksillensa essive -uksenaan -uksenansa -uksinaan -uksinansa translative -uksekseen -ukseksensa -uksikseen -uksiksensa abessive -uksettaan -uksettansa -uksittaan -uksittansa instructive — — comitative — -uksineen -uksinensa

See the etymology of -uus.

-us (front vowel harmony variant -ys, linguistic notation -Us)

1. Short form of the suffix -uus, used where the stem of the root adjective ends in a vowel.

Inflection of -us (Kotus type 40*F/kalleus, t-d gradation)
nominative		-us	-udet
genitive		-uden	-uksien
partitive		-utta	-uksia
illative		-uteen	-uksiin
		singular	plural
nominative		-us	-udet
accusative	nom.	-us	-udet
	gen.	-uden
genitive		-uden	-uksien
partitive		-utta	-uksia
inessive		-udessa	-uksissa
elative		-udesta	-uksista
illative		-uteen	-uksiin
adessive		-udella	-uksilla
ablative		-udelta	-uksilta
allative		-udelle	-uksille
essive		-utena	-uksina
translative		-udeksi	-uksiksi
abessive		-udetta	-uksitta
instructive		—	-uksin
comitative		See the possessive forms below.

Possessive forms of -us (Kotus type 40*F/kalleus, t-d gradation)

first-person singular possessor singular plural nominative -uteni -uteni accusative nom. -uteni -uteni gen. -uteni genitive -uteni -uksieni partitive -uttani -uksiani inessive -udessani -uksissani elative -udestani -uksistani illative -uteeni -uksiini adessive -udellani -uksillani ablative -udeltani -uksiltani allative -udelleni -uksilleni essive -utenani -uksinani translative -udekseni -uksikseni abessive -udettani -uksittani instructive — — comitative — -uksineni second-person singular possessor singular plural nominative -utesi -utesi accusative nom. -utesi -utesi gen. -utesi genitive -utesi -uksiesi partitive -uttasi -uksiasi inessive -udessasi -uksissasi elative -udestasi -uksistasi illative -uteesi -uksiisi adessive -udellasi -uksillasi ablative -udeltasi -uksiltasi allative -udellesi -uksillesi essive -utenasi -uksinasi translative -udeksesi -uksiksesi abessive -udettasi -uksittasi instructive — — comitative — -uksinesi first-person plural possessor singular plural nominative -utemme -utemme accusative nom. -utemme -utemme gen. -utemme genitive -utemme -uksiemme partitive -uttamme -uksiamme inessive -udessamme -uksissamme elative -udestamme -uksistamme illative -uteemme -uksiimme adessive -udellamme -uksillamme ablative -udeltamme -uksiltamme allative -udellemme -uksillemme essive -utenamme -uksinamme translative -udeksemme -uksiksemme abessive -udettamme -uksittamme instructive — — comitative — -uksinemme second-person plural possessor singular plural nominative -utenne -utenne accusative nom. -utenne -utenne gen. -utenne genitive -utenne -uksienne partitive -uttanne -uksianne inessive -udessanne -uksissanne elative -udestanne -uksistanne illative -uteenne -uksiinne adessive -udellanne -uksillanne ablative -udeltanne -uksiltanne allative -udellenne -uksillenne essive -utenanne -uksinanne translative -udeksenne -uksiksenne abessive -udettanne -uksittanne instructive — — comitative — -uksinenne third-person possessor singular plural nominative -utensa -utensa accusative nom. -utensa -utensa gen. -utensa genitive -utensa -uksiensa partitive -uttaan -uttansa -uksiaan -uksiansa inessive -udessaan -udessansa -uksissaan -uksissansa elative -udestaan -udestansa -uksistaan -uksistansa illative -uteensa -uksiinsa adessive -udellaan -udellansa -uksillaan -uksillansa ablative -udeltaan -udeltansa -uksiltaan -uksiltansa allative -udelleen -udellensa -uksilleen -uksillensa essive -utenaan -utenansa -uksinaan -uksinansa translative -udekseen -udeksensa -uksikseen -uksiksensa abessive -udettaan -udettansa -uksittaan -uksittansa instructive — — comitative — -uksineen -uksinensa

• su

From -u (diminutive suffix) +‎ -s (diminutive suffix).^[1]

• IPA^(key): [uʃ]

-us

1. (diminutive suffix) Added to a proper noun or other nouns to create a diminutive noun.

   Teréz (“Theresa”) → Terus (“Tess”)

   apa (“father”) → apus (“dad”)

   cica (“cat”) → cicus (“kitty”)

   kutya (“dog”) → kutyus (“pooch, puppy”)

2. A distinguishable foreign word ending in nouns. It cannot be considered as an independent Hungarian suffix.

   agronómus (“agronomist”)

• (diminutive suffix): It creates diminutive or affectionate forms, most of the time of people’s given names, but also of common nouns, usually from ones ending in -a. Other examples: Anna → Annus, Magda → Magdus, Gyula → Gyulus. The -ka diminutive suffix can also be appended after -us to further increase the degree of endearment: apuska, cicuska, kutyuska, Annuska, Magduska.

• -is
• Appendix:Hungarian suffixes

• Attila Mártonfi: The System of the Hungarian Suffixes, Theses of PhD Dissertation, Budapest, 2006

From Proto-Finnic *-us. Cognates include Finnish -us.

• (Ala-Laukaa) IPA^(key): /-us/, [-uz̠]
• (Soikkola) IPA^(key): /-us/, [-uʒ̥]

-us (front vowel variant -ys)

1. Forms nouns denoting resemblance.

   ‎pääl (“above”) + ‎-us → ‎päälys (“surface”)

Declension of -us (type 2/petos, no gradation)
	singular	plural
nominative	-us	-ukset
genitive	-uksen	-uksiin
partitive	-usta, -ust	-uksia
illative	-uksee	-uksii
inessive	-uksees	-uksiis
elative	-uksest	-uksist
allative	-ukselle	-uksille
adessive	-ukseel	-uksiil
ablative	-ukselt	-uksilt
translative	-ukseks	-uksiks
essive	-uksenna, -ukseen	-uksinna, -uksiin
exessive1)	-uksent	-uksint
1) obsolete *) the accusative corresponds with either the genitive (sg) or nominative (pl) **) the comitative is formed by adding the suffix -ka? or -kä? to the genitive.

See the etymology of the corresponding lemma form.

• (Ala-Laukaa) IPA^(key): /-us/, [-uz̠]
• (Soikkola) IPA^(key): /-us/, [-uʒ̥]

-us (front vowel variant -ys)

1. Alternative form of -uus

Declension of -us (type 2/oikehus, no gradation)
	singular	plural
nominative	-us	-uet
genitive	-uen	-uksin
partitive	-utta	-uksia
illative	-uee	-uksii
inessive	-uees	-uksiis
elative	-uest	-uksist
allative	-uelle	-uksille
adessive	-ueel	-uksiil
ablative	-uelt	-uksilt
translative	-ueks	-uksiks
essive	-uenna, -ueen	-uksinna, -uksiin
exessive1)	-uent	-uksint
1) obsolete *) the accusative corresponds with either the genitive (sg) or nominative (pl) **) the comitative is formed by adding the suffix -ka? or -kä? to the genitive.

• V. I. Junus (1936) Iƶoran Keelen Grammatikka‎^[1], Leningrad: Riikin Ucebno-pedagogiceskoi Izdateljstva, page 57

From Old Latin -os, from Proto-Italic *-os, from Proto-Indo-European *-os (adjectival ending). Cognate with Ancient Greek -ος (-os), Proto-Germanic *-az, Icelandic -ur, Sanskrit -अः (-aḥ), Proto-Slavic *-ъ.

• (Classical Latin) IPA^(key): /us/, [ʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /us/, [us]

-us

1. suffix of nouns in the second declension.
   1. (chiefly) nominative singular of -us
   2. (not productive) nominative/accusative/vocative singular of -us for second-declension neuter nouns.

      vīrus (“a poisonous or acrid secretion”); vulgus (“common people”); pelagus (“sea”)

2. suffix of adjectives in the first/second declension.
   1. (chiefly) nominative singular of -us
3. (New Latin) suffix used to Latinize names ending in consonants.

Second-declension noun forms

Second-declension noun, with locative. Case Singular Plural Nominative -us -ī Genitive -ī -ōrum Dative -ō -īs Accusative -um -ōs Ablative -ō -īs Vocative -e -ī Locative -ī -īs Second-declension noun (neuter, nominative/accusative/vocative plural in -a). Case Singular Plural Nominative -us -a Genitive -ī -ōrum Dative -ō -īs Accusative -us -a Ablative -ō -īs Vocative -us -a Note: The plural exists for New Latin vīrus.

Adjective forms
First/second-declension adjective, with locative. Number Singular Plural Case / Gender Masculine Feminine Neuter Masculine Feminine Neuter Nominative -us -a -um -ī -ae -a Genitive -ī -ae -ī -ōrum -ārum -ōrum Dative -ō -ō -īs Accusative -um -am -um -ōs -ās -a Ablative -ō -ā -ō -īs Vocative -e -a -um -ī -ae -a Locative -ī -ae -ī -īs

Generally from Proto-Indo-European *-os (suffix forming neuter s-stem nouns from verbs), as in genus n from *ǵénh₁os n (“race”). Not a productive derivational suffix in Latin. The plural and oblique case forms have -r- as the result of the sound change of rhotacism. Additionally, in many words, the oblique stem has the vowel -ĕ- (as in generis), which is generally taken to be the phonetically regular development of the Proto-Indo-European forms. Some words, such as as decus, decoris, instead have -ŏ- in the oblique stem; this is the result of analogical introduction of the rounded vowel from the nominative/accusative singular form.

• (Classical Latin) IPA^(key): /us/, [ʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /us/, [us]

-us

1. ending of some neuter nouns in the third declension.
   1. nominative/accusative/vocative singular of -us

Third-declension noun forms

Third-declension noun (neuter, imparisyllabic non-i-stem). Case Singular Plural Nominative -us -ora Genitive -oris -orum Dative -orī -oribus Accusative -us -ora Ablative -ore -oribus Vocative -us -ora Third-declension noun (neuter, imparisyllabic non-i-stem). Case Singular Plural Nominative -us -era Genitive -eris -erum Dative -erī -eribus Accusative -us -era Ablative -ere -eribus Vocative -us -era From the noun tempus, the locative forms temperī and temporī were used adverbially, as well as the ablative tempore.

• Romanian: -uri (from the plural -ora, with the final vowel replaced due to analogy with feminine plural forms)^[1][2]

Not a single suffix, but an ending of various miscellaneous origins. In most words, from Old Latin -us, from Proto-Italic *-us, from Proto-Indo-European *-us as the final part of Proto-Indo-European *-tus (suffix deriving action nouns from verb roots).

• (Classical Latin) IPA^(key): /us/, [ʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /us/, [us]

-us

1. nominative/vocative singular of -us for nouns in the fourth declension.

Fourth-declension noun forms
Fourth-declension noun. Case Singular Plural Nominative -us -ūs Genitive -ūs -uum Dative -uī -ibus Accusative -um -ūs Ablative -ū -ibus Vocative -us -ūs Fourth-declension noun (dative/ablative plural in -ubus). Case Singular Plural Nominative -us -ūs Genitive -ūs -uum Dative -uī -ubus Accusative -um -ūs Ablative -ū -ubus Vocative -us -ūs

-ūs

1. nominative/vocative plural of -us for fourth-declension nouns.
2. genitive singular of -us for fourth-declension nouns.
3. accusative plural of -us for fourth-declension nouns.

• -tus

• “-us” on page 2,108/2 of the Oxford Latin Dictionary (1st ed., 1968–82)

Ultimately from Proto-Indo-European *-ós (“adjectival ending”). Pairs such as lañkas (“bend”) : lankùs (“flexible”) find parallels in Sanskrit रुधिर (rúdhira-, “blood”) : रुधिर (rudhirá-, “red”), Ancient Greek δόλιχος (dólikhos, “a long run”) : δολιχός (dolikhós, “long”) and suggest that oxytone stress was used to mark adjectives in Proto-Indo-European. In Proto-Balto-Slavic, the raising of *o to *u must have been conditioned by stress, with the ending *-os giving Lithuanian -ùs under stress and -as otherwise.^[1]

• IPA^(key): /ʊs/

-ùs m stress pattern 4

1. Adjectival suffix, applied to verbal and nominal roots to denote a disposal or tendency towards something

   ardýti (“take apart”) → ardùs (“crumbly”)

   kalbėti (“talk”) → kalbùs (“talkative”)

• -usis

From Proto-Balto-Slavic *-us, reflecting Proto-Indo-European u-stems.

• -ius

• IPA^(key): /ʊs/

-us, -ùs m

1. Masculine nominal singular ending for u-stem nouns and adjectives.

   alùs (“beer”) (< Proto-Indo-European *h₂elu-)

   sūnùs (“son”) (< Proto-Indo-European *suHnús)

(noun):

(adjective):

From an older *-uos (compare the pronominal ending -uosius). From Proto-Balto-Slavic *-ons; compare Latvian -us, Old Prussian -ans, Proto-Slavic *-y. From Proto-Indo-European *-ons (“accusative plural ending”), also reflected in Ancient Greek -ους (-ous), Latin -ōs, Sanskrit -आन् (-ān) and Gothic -𐌰𐌽𐍃 (-ans).

• -ius
• -uos, -iuos

• IPA^(key): /ʊs/

-us, -ùs

1. Used to form accusative plurals of masculine a- and u-stem nouns.
2. Used to form accusative plurals of masculine a-stem adjectives.

• -uosius

From Proto-Indo-European *-wōs. Cognate with Proto-Slavic *-vъ. See also -usi.

• -ius

• IPA^(key): /ʊs/

-us

1. Used to form the past adverbial (padalyvis) participle

   bū́ti (“to be”) → bùvo (“was”) → bùvus (“having been”)

   slė̃pti (“hide”) → past frequentative slė̃pdavo (“hid”) → slė̃pdavus (“having hidden”)

• -ęs

From Proto-Finnic *-us. Cognates include Finnish -us and Estonian -us.

• IPA^(key): /-us/

-us (front vowel variant -ys)

1. Used to form action nouns from verbs; -ion

-us

1. Alternative form of -ous

From Proto-Brythonic *-ʉs, from Latin -ōsus.^[1] Cognate with Cornish -us.

-us

1. -ous, full of, prone to; used to form adjectives from nouns

• Welsh: -us

From Proto-Samic *-ōksë.

-us

1. Forms nouns from verbs, indicating something that is to have the verb's action performed on it.

   ‎vuošˈšat (“to cook”) + ‎-us → ‎vuoššus (“something to be cooked”)

   ‎muitalit (“to tell”) + ‎-us → ‎muitalus (“something to be told; story”)

2. Forms nouns from verbs, indicating something that results from having the verb's action performed.

   ‎juohkit (“to divide”) + ‎-us → ‎juogus (“division, section”)

• This suffix triggers the weak grade on a preceding stressed syllable in the nominative singular and essive, and the strong grade in the other forms.

When attached to even-syllable stems, there is diphthong simplification in all forms except the nominative singular and essive.

For even-syllable stems:

Odd, no gradation
Nominative	-us
Genitive	-usa
	Singular	Plural
Nominative	-us	-usat
Accusative	-usa	-usiid
Genitive	-usa	-usiid
Illative	-usii	-usiidda
Locative	-usis	-usiin
Comitative	-usiin	-usiiguin
Essive	-usin
Possessive forms Singular Dual Plural 1st person -usan -useamẹ -useamẹt 2nd person -usat -useattẹ -useattẹt 3rd person -usis -useaskkạ -useasẹt

For odd-syllable stems:

Even a-stem, ss-s gradation
Nominative	-us
Genitive	-usa
	Singular	Plural
Nominative	-us	-usat
Accusative	-usa	-usaid
Genitive	-usa	-usaid
Illative	-ussii	-usaide
Locative	-usas	-usain
Comitative	-usain	-usaiguin
Essive	-ussan
Possessive forms Singular Dual Plural 1st person -ussan -ussame -ussamet 2nd person -ussat -ussade -ussadet 3rd person -ussas -ussaska -ussaset

• -eus, -eux, -os, -ous

From Latin -ōsus.

-us

1. -ous, used for forming adjectives

• Middle French: -eux, -eulx
  • French: -eux, -ueux
    • → Danish: -øs
    • → Dutch: -eus
    • → German: -ös
    • → Norwegian: -øs
    • → Swedish: -ös
• Norman: -eux
• → Middle English: -ous, -os, -ose, -ouse, -ows, -owse, -us, -ws
  • English: -ous

From Proto-Celtic *-es-tus.

• IPA^(key): /us/

-us

1. Alternative form of -as

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

-us (suffixed pronoun)

1. her (object pronoun), it (in reference to a feminine noun)
2. them

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

• IPA^(key): /us/
• Rhymes: -us
• Syllabification: us

-us

1. derogatory suffix

   ‎sługa + ‎-us → ‎sługus

2. demonym suffix

   ‎Kraków + ‎-us → ‎krakus

• -us in Polish dictionaries at PWN

From Middle Welsh -us, from Proto-Brythonic *-ʉs, from Latin -ōsus.^[1] Cognate with Cornish -us, Breton -us and English -ous.

• (North Wales) IPA^(key): /ɨ̞s/
• (South Wales) IPA^(key): /ɪs/

-us

1. adjectival suffix often indicating a characteristic, propensity or abundance

   ‎blas (“taste”) + ‎-us → ‎blasus (“tasty”)

   ‎gwybod (“to know”) + ‎-us → ‎gwybodus (“knowledgeable”)

   ‎anffawd (“misfortune”) + ‎-us → ‎anffodus (“unfortunate”)

2. (chemistry) -ous, Used in chemical nomenclature to name chemical compounds in which a specified chemical element has a lower oxidation number than in the equivalent compound whose name ends in the suffix -ig. For example asid nitrus (“nitrous acid, HNO₂”) has fewer oxygen atoms per molecule than asid nitrig (“nitric acid, HNO₃”).

• R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “-us”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies