掩杀

to make a surprise attack / to pounce on (an enemy)

to cover up / to close / to surprise

to cover up; to conceal / to close (a door, book etc) / (coll.) to get (one's fingers etc) caught when closing a door or lid / (literary) to launch a surprise attack

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