崩 (Kanji for collapse)

Onyomi

HOU	The HOE collapsed in mid-fuck because of a heroin overdose. Occupational hazard!

Seismologists estimate that that mountain will collapse two months from now. Volcanic hell!! Occupational hazard!

( を ) くず＊す	I pull something down ☆☆☆☆☆
( が ) くず＊れる	something collapses ★★☆☆☆

崩壊(ほうかい)

collapse ★☆☆☆☆
崩 (collapse) + 壊 (break) = 崩壊 (collapse)

a collapse- said of a building, but also (figuratively) like 'The collapse of communism.'