遮掩

to cover / to mask / to cover up or conceal (the truth etc)

to cover up (a shortcoming) / to screen off / to hide / to conceal

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 be secretive; to try to cover up (idiom)