大人びる おとなびる Meanings Ichidan verb, Intransitive to look (sound, behave) grown-up; to be adult-like; to mature (usu. 〜た/て) Kanji 大 big 人 person Example sentences その少年は大人びて見えた。The boy looked like a grown-up. その少女はドレスのせいで大人びて見えた。That girl's dress made her look like a grown-up. Jinuma: Japanese Dictionary · Word lists