masquerade

(intransitive) To take part in a masquerade; to assemble in masks and costumes; (loosely) to wear a disguise.

(intransitive, figuratively) To pass off as a different person or a person with qualities that one does not possess; also, to make a pretentious show of being what one is not.

(transitive, rare) To conceal (someone) with, or as if with, a mask; to disguise.