cave-in
noun
• a collapse of a roof or underground structure.
• "a mine cave-in"
cave in
• (of a roof or similar structure) subside or collapse.
• "the tunnel walls caved in"
• capitulate or submit under pressure.
• "eventually, Danny caved in and let him stay"
Similar:
yield,
surrender,
submit,
succumb,
back down,
make concessions,
capitulate,
give up/in,
raise/show the white flag,
acquiesce,
agree,
concur,
approve,
assent,
throw in the towel,
throw in the sponge,
Opposite:
hold out against,