Incompetent
Part of speech: noun
Definition: A person who is incompetent.
Part of speech: adjective
Definition: Unskilled, lacking normally expected degree of ability. Unable to make rational decisions, insane or otherwise cognitively impaired.
Example sentence: Donald Trump's mini-me, Boris Johnson, is in the ascendant: the Tory crown is his to lose. But his colleagues know he's an incompetent, a man who cares only for himself, who was fired twice - by a newspaper editor and a party leader - over allegations of dishonesty.
Unskilled
Part of speech: adjective
Definition: Of a person or workforce: not having a skill or technical training.Of a job: not requiring skill or training.Of a made object: inexpertly made or showing a lack of skill.
Example sentence: Alan Greenspan is unskilled; you don't take the unskilled seriously.