Not suited to circumstances:
improper, inappropriate, incongruous, inept, malapropos, unapt, unbecoming, unbefitting, unfit, unseemly, unsuitable. Idiom: out of place. See agree, usualNot suited to a given purpose:
ill-suited, inappropriate, unfit, unsuitable, unsuited. See abilityLacking the qualities, as efficiency or skill, required to produce desired results:
incapable, incompetent, inefficient, inept, inexpert, unskilled, unskillful, unworkmanlike. See ability
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