maternal

PIE word *méh₂tēr The adjective is derived from Late Middle English maternal, maternall, from Middle French maternel (“maternal”) (modern French maternel (“maternal; native”)), or from its etymon Late Latin māternālis (“maternal”), from Latin māternus (“maternal; related to the mother or her side of the family”) + -ālis (suffix forming adjectives of relationship from nouns). Māternus is derived from māter (“mother”) (ultimately from Proto-Indo-European *méh₂tēr (“mother”)) + -rnus (suffix forming adjectives). The English word is cognate with Italian maternale, materno, Portuguese maternal, materno, Spanish maternal, materno. The noun is derived from the adjective.

出典: Wiktionary「maternal」（CC BY-SA 4.0）