not competent; lacking qualification or ability; incapable

an incompetent candidate.

characterized by or showing incompetence

His incompetent acting ruined the play.

Law .

being unable or legally unqualified to perform specified acts or to be held legally responsible for such acts.

inadmissible, as evidence.

an incompetent person; a mentally deficient person.

Law . a person lacking power to act with legal effectiveness.

adjective

able , adept , capable , competent , dexterous , effective , efficient , experienced , expert , proficient , skillful

adjective

amateur , amateurish , awkward , bungling , bush-league * , clumsy , disqualified , floundering , helpless , inadequate , incapable , ineffectual , inefficient , ineligible , inept , inexperienced , inexpert , insufficient , maladroit , not cut out for , not equal to , not have it , out to lunch , raw , unadapted , unequipped , unfit , unfitted , unhandy , uninitiated , unproficient , unqualified , unskilled , untrained , uselessnotes:incompetent means not qualified or showing lack of skill or aptitude; incontinent means lacking control over urination and defecation , unequal , unable , inapt , unskillful , unworkmanlike , impertinent , inadmissible , incapacitated , lacking , non compos , unsuited , useless