замирание (звука, колебаний)

муз.

"угасая" (нотное указание); "замирая"

тех.

замирание

юр.

отмирание

die away

заг.

глохнуть; затихать; гаснуть; замолкать (of noise, sounds, conversation, etc.); истлевать; угаснуть; угасать (The darkness deepening as the fire died away, the stillness of the night, the low wailing of a wind growing out of the north roused in him the unrest and doubt that sunshine and day had dispelled.); переходить (into; во что-либо); увядать; увянуть; завядать (MichaelBurov); отмереть; отмирать; затухать; затухнуть; ослабиться; прекращаться; смолкнуть (of noise, sounds, etc.); умолкать (of noise, sounds, etc.); умолкнуть (of noise, sounds, etc.); замирать (о звуке); упасть в обморок; сливаться (with; с чем-либо); стихать (особ. о звуках, реже о ветре • The firing finally began to die away in the late afternoon. В.И.Макаров); растаять (о звуке: "the sound of his voice died away" Рина Грант); завянуть (MichaelBurov); стихнуть (особ. о звуках, реже о ветре • The echo slowly died away. • The sound of his footsteps gradually died away. • The firing finally began to die away in the late afternoon. • The sound died away and silence reigned. • The wind died away completely, and we were left motionless as the fog rolled in. В.И.Макаров); смолкать (of noise, sounds, etc.); замолкнуть (of noise, sounds, conversation, etc.); утихать; утихнуть

Gruzovik