charlatan

/ˈʃɑrlətən/
noun
  1. A person who pretends to have more knowledge or skill than they really have, especially in medicine or other professional fields.
    • Investors lost their savings to a charlatan who promised guaranteed returns.
    • She realized the wellness guru was a charlatan when none of his treatments worked.
    • The so-called doctor was exposed as a charlatan who had never attended medical school.
Antonyms
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