WordNet sense 1 (fall apart):

collapse, crumble, crumple, tumble

WordNet sense 2 (lose control of one's emotions):

snap, lose it

WordNet sense 3 (make ineffective):

crush

WordNet sense 4 (make a mathematical, chemical, or grammatical analysis of; break down into components or essential features):

analyze, dissect, analyse, take apart

WordNet sense 5 (stop operating or functioning):

break, die, fail, go, give way, conk out, give out, go bad

WordNet sense 6 (separate (substances) into constituent elements or parts):

decompose, break up