pretender
🇺🇸
/prɪˈtendər/
🇬🇧
/prɪˈtendə(r)/
someone who falsely claims to have a particular title or position
The pretender claimed to be the rightful king, but his lies were soon exposed.
那个冒名顶替者声称自己是合法的国王,但他的谎言很快就被揭穿了。