incompetent
1. [ noun ] someone who is not competent to take effective action
Synonyms: incompetent_person
Related terms: unskilled_person slouch bungler
2. [ adjective ] not doing a good job
Synonyms: unskilled
Examples:

"incompetent at chess"

Related terms: bad
3. [ adjective ] not qualified or suited for a purpose
Examples:

"an incompetent secret service" "the filming was hopeless incompetent"

Related terms: competent incapable feckless ineffective unqualified unworkmanlike incapable unskilled unqualified inefficient
4. [ adjective ] showing lack of skill or aptitude
Synonyms: fumbling clumsy bungling
Examples:

"a bungling workman" "did a clumsy job" "his fumbling attempt to put up a shelf"

Related terms: unskilled
5. [ adjective ] not meeting requirements
Synonyms: unequal_to incapable
Examples:

"unequal to the demands put upon him"

Related terms: inadequate
Similar spelling:   incompetently
  incompetency
  incompetence
  incomplete
  incompleteness
  incompletely
  inconsistent
  incomputable
  incompatibly
  incompatible
  incommensurate
  innocently
  inconsistently
  incomparable
  incommutable
  incommode
  in_camera