拆穿

拆穿	chāi chuān	to expose / to unmask / to see through (a lie etc)
拆	chāi	to tear open / to tear down / to tear apart / to open
穿	chuān	to bore through; to pierce; to perforate / to go through (e.g. a tunnel); to cross (e.g. a street) / to thread; to string together / to wear; to put on (clothes, shoes etc.) / verb complement indicating thoroughness or completion