任せる
JLPT N3 · Verbまかせる(makaseru)声调 3
to leave (a matter, decision, etc. to someone); to entrust (to someone); to entrust (someone) with; to leave (to chance, one's imagination, etc.); to let (take its own course); to let (happen)
この仕事を山田さんに任せる。— I'll leave this job to Mr. Yamada.