incompetent

Definitions

General English

  • adjective who cannot work well, who is not able to do something

Commerce

  • adjective unable to work effectively

Law

  • adjective unable to carry out duties to the required standard
  • adjective not legally able to do something

Military

  • adjective unable to perform your role satisfactorily (due to lack of knowledge or motivation)

Sports

  • adjective lacking the skills, qualities or ability to do something
http://www.dictionarycentral.com/definition/incompetent.html