What is the meaning of incompetent?

noun

• Someone who is not competent to take effective action.
  • synonyms: incompetent person

adjective

• Legally not qualified or sufficient.
  • usage: "a wife is usually considered unqualified to testify against her husband"; "incompetent witnesses"
  • synonyms: unqualified
• Not qualified or suited for a purpose.
  • usage: "an incompetent secret service"; "the filming was hopeless incompetent"
• Showing lack of skill or aptitude.
  • usage: "a bungling workman"; "did a clumsy job"; "his fumbling attempt to put up a shelf"
  • synonyms: bungling, clumsy, fumbling
• Not doing a good job.
  • usage: "incompetent at chess"
  • synonyms: unskilled
• Not meeting requirements.
  • usage: "unequal to the demands put upon him"
  • synonyms: incapable, unequal to