故態(tài)復萌

- return to one's old habits; resume one's former manner; revert to one's old way of life; play one's old tricks again; relapse into error; go [slip] back to [into] one's old way of doing things; return [resume] to one's old manners; return to one's old vices; be up to one's old trick(s) again; go back to a bad [reprehensible] way of behaving; lapse into one's former habits [ways]; return to life; Old habits come back again.