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to entrust (someone) with; to pin one's hopes on (someone's future); to have great expectations for
to have (someone) deliver (a letter, etc.); to leave (a message); to send word
「属する」 has another reading with different meanings.
彼は営業部に属している若手社員だね。
He is an employee belonging to the sales department.
このクラブに属することを誇りに思う。
I'm proud to belong to this club.
哺乳類に属する動物について調べた。
I researched animals belonging to mammals.