duo
du-o
From Proto-Italic *duō, from Proto-Indo-European *dwóh₁ (which was inflected as a dual). Cognates include Ancient Greek δύο (dúo), Sanskrit द्व (dvá), Old Church Slavonicдъва (dŭva), and Old English twā (whence English two).
Pronunciation
- (Classical Latin) IPA(key): [ˈdu.ɔ]
- (modern Italianate Ecclesiastical) IPA(key): [ˈd̪uː.o]
Numeral
duo (feminine duae, neuter duo); numeral, plural only
- two; 2
Usage notes
- See Appendix:Latin cardinal numbers.
Declension
Numeral, plural only.
| plural | |||
|---|---|---|---|
| masculine | feminine | neuter | |
| nominative | duo | duae | duo |
| genitive | duōrum
duum |
duārum | duōrum
duum |
| dative | duōbus | duābus | duōbus |
| accusative | duōs
duo |
duās | duo |
| ablative | duōbus | duābus | duōbus |
| vocative | duo | duae | duo |