incapable
//ɪnˈkeɪpəbəl//
Adjective
incapableCanonical form
1
Lacking the ability, skill, or qualification to do something.
He is incapable of telling a lie.
2
Not susceptible to or admitting of something; not able to experience or undergo.
The evidence is incapable of any other interpretation.
3
Unable to behave rationally or manage one's own affairs.
After the accident, he was declared legally incapable of managing his own finances.