Synonyms and related words :
adrift, beside the mark, beside the point, beside the question, extraneous, extrinsic, foreign, ill-adapted, ill-assorted, ill-chosen, ill-fitted, ill-matched, ill-sorted, ill-suited, ill-timed, immaterial, impertinent, improper, inadmissible, inapplicable, inappropriate, inapt, incidental, inconsequent, inept, infelicitous, irrelative, irrelevant, mal a propos, maladjusted, malapropos, misjoined, mismatched, mismated, misplaced, nihil ad rem, nonessential, not at issue, off the subject, out of character, out of joint, out of keeping, out of line, out of place, out of proportion, out of season, out of time, out of tune, out-of-the-way, parenthetical, unadapted, unapt, unbecoming, unbefitting, unessential, unfit, unfitted, unfitting, unqualified, unseasonable, unseemly, unsuitable