unus

Latin

Latin cardinal numbers

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Cardinal : ūnus     Ordinal : prīmus     Adverbial : semel     Multiplier : simplex     Distributive : singulī
Latin Wikipedia article on ūnus

Alternative forms

• Symbol: I

Etymology

From Old Latin oinos, from Proto-Italic *oino-, from Proto-Indo-European *óynos (“one, single”). Cognates include Ancient Greek οἶος (oios), Sanskrit एक (éka), Old Church Slavonic ѥдинъ (jedinŭ), and Old English ān (English one and an).

Pronunciation

• (Classical) IPA: /ˈuː.nus/

• Audio (Classical)

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Numeral

ūnus m (feminine ūna, neuter ūnum); irregular first/second declension

1. (cardinal) one; 1
   • ca. 8 CE, Ovid, Metamorphoses, Book VI, lines 644-645

     satis illi ad fata vel unum vulnus erat: iugulum ferro Philomela resolvit

     "Sufficient was this one wound to kill; but Philomela also cut open the throat"

   • 405, Jerome and others, Vulgate, Nehemiae 1:2 (II Esdrae 1:2)

     et venit Anani unus de fratribus meis ipse et viri ex Iuda et interrogavi eos de Iudaeis qui remanserant et supererant de captivitate et de Hierusalem

     "and Hanani came, one of my brethren, he and certain men of Judah; and I asked them concerning the Jews that had escaped, which were left of the captivity, and concerning Jerusalem"

   • 6th c. — Boethius, Commentarium in librum Aristotelis Peri hermeneias primae editionis, Book I, section 5

     In summam igitur ūnārum ōrātiōnum aliae sunt significātiōne ūnae, aliae coniūnctiōne.

     "In summary therefore, of one theme others are (by signification) one, some with connections."

Usage notes

See Appendix:Latin cardinal numbers

Inflection

Irregular: similar to first and second declensions but with singular genitives ending in -īus and singular datives ending in -ī.

Number	Singular				Plural
Case \ Gender	Masculine	Feminine	Neuter		Masculine	Feminine	Neuter
nominative	ūnus	ūna	ūnum		ūnī	ūnae	ūna
genitive	ūnīus	ūnīus	ūnīus		ūnōrum	ūnārum	ūnōrum
dative	ūnī	ūnī	ūnī		ūnīs	ūnīs	ūnīs
accusative	ūnum	ūnam	ūnum		ūnōs	ūnās	ūna
ablative	ūnō	ūnā	ūnō		ūnīs	ūnīs	ūnīs
vocative	ūne	ūna	ūnum		ūnī	ūnae	ūna

Derived terms

• ūni-
• ūnicus
• ūniō
• ūnitās

Descendants

Aromanian: unu Asturian: ún, unu Bolognese: ón Calabrian: unu Catalan: un Corsican: unu Dalmatian: join Esperanto: unu French: un

Friulian: un Galician: un Ido: un Interlingua: un Italian: uno, un Lombard: vun Novial: un Occitan: un Old Portuguese: ũu

Portuguese: um Provençal: un Romanian: unu, un Romansch: in Sardinian: unu Spanish: uno, un Walloon: onk

See also

• Appendix:Latin cardinal numbers