die downvi phrasalphrasal verb, intransitive: Verb with adverb(s) or preposition(s), having special meaning and not taking direct object--for example, "make up" [=reconcile]: "After they fought, they made up."
(diminish, subside)
逐渐变弱 zhú jiàn biàn ruò
The shouting died down when the rock star began singing.