incompetent
adjective
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not meeting requirementsincapable
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not qualified or suited for a purpose“an incompetent secret service”
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legally not qualified or sufficientunqualified
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not doing a good job“incompetent at chess”unskilled
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showing lack of skill or aptitudebunglingclumsyfumbling
noun
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someone who is not competent to take effective actionincompetent person