cave in

引っ込む、落ちる、倒れる、凹む

cave in の類語

give way, collapse, fall in, break, give, founder, drop, fall, settle, cave, flop, settle down, slump, lower, set, wear thin, back down, fail, flag, go down, give out, break in, decline, breakdown, plop, sink, yield, pine, break down, break through, peter out, wear away, fade, come apart, breaking up, faint, go to pieces, go soft, burst in, cup, fold up, weaken, lapse, sink down, crumble, topple, sag, split, wilt, bowl, swag, plump, give in, crash, give up, crack-up, disaster, poop out, go downhill, subside

例文

• The tunnel caved in because of the earthquake the other day.
  そのトンネルは先日の地震で崩れ落ちた。

cave in の言い換えを探すには

cave in（引っ込む）の類語・言い換え（パラフレーズ）を、日本語訳つきで関連度順に並べています。英作文の語彙を増やしたいとき、長文読解で本文と選択肢の言い換えを見抜きたいときに使えます。