なりすます

to pose as

Meanings

also 成りすます · 成り済ます

  1. godan verb, intransitive, usually in kana to pose as; to (successfully) impersonate; to pretend to be; to pass oneself off as; to disguise oneself as
  2. usually in kana to (completely) become; to (fully) turn into

In sentences

彼かれは全まったく別人べつじんになりすました。 He assumed a new identity. #102946