Antonyms of adj competent

3 senses of competent

Sense 1
competent (vs. incompetent) -- (properly or sufficiently qualified or capable or efficient; "a competent typist")

incompetent (vs. competent) -- (not qualified or suited for a purpose; "an incompetent secret service"; "the filming was hopeless incompetent")
        => feckless, inept -- (generally incompetent and ineffectual; "feckless attempts to repair the plumbing"; "inept handling of the account")
        => ineffective, inefficient -- (lacking the ability or skill to perform effectively; inadequate; "an ineffective administration"; "inefficient workers")
        => unworkmanlike -- (not characteristic of or suitable for a good workman; "an unworkmanlike result"; "an unworkmanlike tool")

Sense 2
competent -- (adequate for the purpose; "a competent performance")

INDIRECT (VIA adequate) -> inadequate, unequal -- (lacking the requisite qualities or resources to meet a task; "inadequate training"; "the staff was inadequate"; "she was unequal to the task")

Sense 3
competent (vs. incompetent) -- (legally qualified or sufficient; "a competent court"; "competent testimony")

incompetent (vs. competent), unqualified -- (legally not qualified or sufficient; "a wife is usually considered unqualified to testify against her husband"; "incompetent witnesses")

Similarity of adj competent

3 senses of competent

Sense 1
competent (vs. incompetent) -- (properly or sufficiently qualified or capable or efficient; "a competent typist")
       => able, capable -- (have the skills and qualifications to do things well; "able teachers"; "a capable administrator"; "children as young as 14 can be extremely capable and dependable")
       => effective, efficient -- (able to accomplish a purpose; functioning effectively; "people who will do nothing unless they get something out of it for themselves are often highly effective persons..."-G.B.Shaw; "effective personnel"; "an efficient secretary"; "the efficient cause of the revolution")
       => workmanlike -- (worthy of a good workman; "a competent job"; "the book is a workmanlike job with chronology and bibliography and index")
          Also See-> capable#1; efficient#1; qualified#1; skilled#1

Sense 2
competent -- (adequate for the purpose; "a competent performance")
       => adequate (vs. inadequate), equal -- (having the requisite qualities or resources to meet a task; "she had adequate training"; "her training was adequate"; "she was adequate to the job"; "he was equal to the task")

Sense 3
competent (vs. incompetent) -- (legally qualified or sufficient; "a competent court"; "competent testimony")