to assume the character or appearance of; pretend to be

He was arrested for impersonating a police officer.

to mimic the voice, mannerisms, etc., of (a person) in order to entertain.

to act or play the part of; personate.

Archaic . to represent in personal or bodily form; personify; typify.

embodied in a person; invested with personality.

verb

be original , differ , oppose , reverse

verb

act , act a part , act like , act out , ape , assume character , ditto * , do , do an impression of , double as , dress as , enact , fake , imitate , make like , masquerade as , mimic , mirror , pass oneself off as , perform , personate , play , playact , play a role , portray , pose as , put on an act * , represent , take the part of , attitudinize , masquerade , pass , posture , play-act , copy , personify , pose