反杀

反杀	fǎn shā	to respond to an assault by killing one's assailant
反	fǎn	contrary / in reverse / inside out or upside down / to reverse / to return / to oppose / opposite / against / anti- / to rebel / to use analogy / instead / abbr. for 反切 phonetic system
杀	shā	to kill; to slay; to murder; to attack / to weaken; to reduce / (dialect) to smart / (used after a verb) extremely