Impostor

·noun One who imposes upon others; a person who assumes a character or title not his own, for the purpose of deception; a pretender.

impostor
impostor (inp-), ōris, m. [impono, II. B. 3.], a deceiver , impostor (post-class.; cf.: planus, ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.