INCOMPETENT
incompetent
Noun
- A person who is incompetent.
Adjective
incompetent
- Unskilled, lacking normally expected degree of ability.
- Having an incompetent lawyer may be grounds for a retrial, but the lawyer in question probably doesn't know that.
- Unable to make rational decisions, insane or otherwise cognitively impaired.
- The charged was judged incompetent to stand trial, at least until his medication started working.
The above text is a snippet from Wiktionary: incompetent
and as such is available under the Creative Commons Attribution/Share-Alike License.