incompetent

(noun) someone who is not competent to take effective action. Synonyms: incompetent person.

(adj) legally not qualified or sufficient. Synonyms: incompetent (vs. competent), unqualified. Examples: "A wife is usually considered unqualified to testify against her husband." "Incompetent witnesses."

(adj) not qualified or suited for a purpose. Synonyms: incompetent (vs. competent). Examples: "An incompetent secret service." "The filming was hopeless incompetent."

(adj) showing lack of skill or aptitude. Synonyms: bungling, clumsy, fumbling. Examples: "A bungling workman." "Did a clumsy job." "His fumbling attempt to put up a shelf."

(adj) not doing a good job. Synonyms: unskilled. Examples: "Incompetent at chess."

(adj) not meeting requirements. Synonyms: incapable, unequal to(predicate). Examples: "Unequal to the demands put upon him."