Incompetent
Origin
From French incompétent
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.
Synonyms
Usage notes
The form incompetent of, as in "I am incompetent of doing anything!" is heard (US). It is incorrect, the intended word is incapable.