Synonyms of INCOMPETENT

someone who is not competent to take effective action

Also: incompetent person.

legally not qualified or sufficient

• UNQUALIFIED24

showing lack of skill or aptitude

• BUNGLING12
• CLUMSY13
• FUMBLING16

not doing a good job

• UNSKILLED14

not meeting requirements

• INCAPABLE15

Also: unequal to.