残杀

to massacre / to slaughter

to destroy / to spoil / to ruin / to injure / cruel / oppressive / savage / brutal / incomplete / disabled / to remain / to survive / remnant / surplus

to kill / to murder / to attack / to weaken or reduce / to smart (dialect) / (used after a verb) extremely

to massacre one another (idiom); internecine strife

killer / butcher / slaughterer