Another word for unfit
unqualified, feeble, unpracticed, inexperienced, untrained, unskilled, weak, impotent, inept, clumsy, debilitated, incapacitated, badly qualified, ill-equipped, unable, unprepared, ineffective, unapt.
Another word for unfitadjective
Not suited to a given purpose:ill-suited, inappropriate, inapt, unsuitable, unsuited. See ability
Not suited to circumstances:improper, inappropriate, inapt, incongruous, inept, malapropos, unapt, unbecoming, unbefitting, unseemly, unsuitable. Idiom: out of place. See agree, usual
Lacking capability:inadequate, incapable, incompetent, unequal, unqualified. See ability, excess
Totally incapable of doing a job:incompetent, unable, unqualified. See ability