Lithuanian keras

← Proto-Balto-Slavic *ker- (derived)

← Proto-Indo-European *k(ʷ)er(H)- (derived)

← Proto-Indo-European *kʷer- (derived)

← Latvian cȩrs (cognate)

← Proto-Slavic *kory (cognate)

← Proto-Slavic *čarъ (cognate)