Old Church Slavonic
- (Glagolitic): ⰿⰾⰰⰴⱏ (mladŭ)
By liquid metathesis from Proto-Slavic *moldъ, from Proto-Balto-Slavic *maldas, from Proto-Indo-European *(h₂)moldos (“soft, weak”). Cognates include Old Prussian maldai (“boys”), Latin mollis (“soft, weak”), Ancient Greek βλαδύς (bladús, “weak”), μελδω (meldō)(transitive)/μελδομαι (meldomai)(intransitive) and ἀμαλδύνω (amaldúnō, “to weaken, destroy”). Other Germanic Indo-European cognates evolved from the meaning of soften: English smelt(transitive)/melt(intransitive), German schmelzen, probably Swedish smultron, Frankish *smalt (whence French émail).