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to move off (into the distance); to become distant; to recede; to fade away; to die away
to drift away (from a person, activity, etc.); to distance oneself (from); to become less frequent (e.g. of visits); to fall away (e.g. of customers)
音楽が徐々に遠のいた。
The music gradually faded away.
彼の声が遠のいていく。
His voice is fading away.