mask

a covering to disguise or conceal the face

activity that tries to conceal something; "no mask could conceal his ignorance"; "they moved in under a mask of friendship"

a party of guests wearing costumes and masks

a protective covering worn over the face

hide under a false appearance; "He masked his disappointment"

put a mask on or cover with a mask; "Mask the children for Halloween"

make unrecognizable; "The herb masks the garlic taste"; "We disguised our faces before robbing the bank"

cover with a sauce; "mask the meat"

shield from light