wind down (something)
/ˈwɑɪn(d)ˈdɑʊn/— phrasal verb with wind us/wɑɪnd/verb past tense and past participle wound /wɑʊnd/
to end gradually or in stages, or to cause something to end in this way:
The storm finally began to wind down after four hours of heavy rain.
Temple University is winding down its 14th consecutive losing season.