cave in
答应与某人或某事物妥协；屈服；退缩
口语·表示屈服或妥协
英文释义
to yield or give in to pressure, demands, or persuasion
例句
After hours of negotiation, the manager finally caved in to the workers' demands.
典故来源
原指洞穴或地面塌陷，后比喻人在压力下像洞穴一样崩塌、放弃立场。