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to entrust (to someone); to leave (in someone's hands)
細かい判断は現場の責任者に委すことにした。
It was decided to leave detailed decisions to the person in charge on site.
後の処理は信頼できる部下に委した。
I entrusted the subsequent handling to a reliable subordinate.
運命を天に委す気持ちで結果を待った。
I waited for the result with the feeling of leaving my fate to heaven.