打垮

打垮	dǎ kuǎ	to defeat / to strike down / to destroy
打	dá	(loanword) dozen / Taiwan pr. [da3]
打	dǎ	to hit; to strike / to fight / (in many expressions) a semantically light transitive verb used with various objects to form expressions with a wide range of meanings, e.g. 打伞 "to hold an umbrella", 打电话 "to make a phone call", 打针 "to get an injection" / (coll.) from; since
垮	kuǎ	to collapse (lit. or fig.)