HSK C7-9
Correct

颓

/ tuí /
Strokes

Definition

to crumble/to collapse/to decline/to decay/decadent/dejected/dispirited/balding

Example

As a Verb

collapse; topple down; become ruined/dilapidated

As a Verb

decline; decay

As an Adjective

decadent; dejected; dispirited