Synonyms for unfit

modified

1. Incompetent

   unqualified, feeble, unpracticed, inexperienced, untrained, unskilled, weak, impotent, inept, clumsy, debilitated, incapacitated, badly qualified, ill-equipped, unable, unprepared, ineffective, unapt.

   Antonyms able*, fit, effective.

2. Unsuitable

   improper, ill-adapted, wrong, ill-advised, unlikely, unpromising, inexpedient, inappropriate, inapplicable, inutile, useless, valueless, mistaken, incorrect, inadequate, flimsy.

   Antonyms fit*, suitable, correct.