the roof caved in : COLLAPSE, fall in/down, give (way), crumble, subside.
the manager caved in to their demands : YIELD, surrender, capitulate, give in, back down, make concessions, throw in the towel/sponge.
2192; headword
CAVE IN
Meaning of CAVE IN in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012