unsuited (adj.)
- disappointing
- disqualified
- ill-chosen
- ill-equipped
- ill-sorted
- ill-timed
- improper
- inadequate
- inadmissible
- inapplicable
- inapposite
- inappropriate
- inapt
- incapable
- incompetent
- inept
- infelicitous
- irrelevant
- maladjusted
- malapropos
- mismatched
- mismated
- misplaced
- objectionable
- unacceptable
- unadapted
- unarmed
- unbecoming
- unbefitting
- unequipped
- unfit
- unfitting
- unqualified
- unseasonable
- unseemly
- unsuitable
- untimely