じみる
染みる
jimiru

Ichidan Verb
Auxiliary Verb

1. to become; to appear like; to have a touch of; to look like

Usually Written in Kana
そんなふるまいをするとはかれ子供こどもじみていた。
sonna furumaio surutowa karemo kodomo jimite ita.
It was childish of him to behave like that.