die down phrasal verb (see also die)
if something dies down, it becomes less strong, active, or violent:
Don’t worry, the gossip will soon die down.
when the excitement had died down

[TahlilGaran] Dictionary of Contemporary English ▲

die down
to become quieter or less easily noticed.
By morning the storm died down.

Anger over the attacks on the refugee camps has not died down.

[TahlilGaran] English Idioms Dictionary ▲

die down
to come slowly to an end, to grow weaker
When the sound of the music died down we were able to go to sleep.

[TahlilGaran] English Idioms Dictionary ▲

die down
{v.} To come slowly to an end; grow slowly less or weaker.
The wind died down.

The music died away.

He waited until the excitement had died down.

His mother's anger died away.

[TahlilGaran] English Idioms Dictionary ▲