/koˈpak/
OrigineFrom older copaci (compare Aromanian cupaci, Megleno-Romanian cupaci, Istro-Romanian copaț (“thicket, brushwood”)), possibly borrowed from Albanian kopaç (“treestump”) or cognate to it as a Balkan substrate root. The current form was probably analogically formed as a singular from the earlier copaci, reinterpreted as a plural. Compare also Proto-Slavic *kopati, which may be the ultimate origin of both the Romanian and Albanian.
Formecopaci(plural) · copac(accusative, indefinite, nominative, singular) · copacul(accusative, definite, nominative, singular) · copaci(accusative, indefinite, nominative, plural) · copacii(accusative, definite, nominative, plural) · copac(dative, genitive, indefinite, singular) · copacului(dative, definite, genitive, singular) · copaci(dative, genitive, indefinite, plural) · copacilor(dative, definite, genitive, plural) · copacule(singular, vocative) · copacilor(plural, vocative)