Synonyms of inept

1 Syllable
splay, splayer
2 Syllables
kidder, undue, awkward, inapt, unapt, tactless, clunky, bumbling, bungling, klutzy, oafish, gawkish, uncool, wooden, gaucher, gauche, clumsy, halting, clumsier, leftfield, artless, loser, left-field, scrapper
3 Syllables
graceless, ill-timed, lead-footed, unhandy, unseemly, blunderous, ham-handed, ill-shaped, lubberly, labored, lumbering, untactful, claudicant, leadfooted, prentice, unable, impotent, unskilled, forceless, useless, slack-spined, ill-fitted, foot-in-mouth, wrong-number, inadept, inexpert, unwiser, unfledged, unskillful, maladroit, impuissant, unfitted
4 Syllables
ungraceful, unusable, unbecoming, unbefitting, heavy-footed, heavyhanded, untalented, unfunctional, unusuable, butterfingers, inproficient, unequipped, undeserved, unhandsome, improficient, nonfunctional, defeasible, inutile, lamebrained, ill-adapted, inconsonant, undexterous, unfacile, unproficient, unpracticed, incompetent, amateurish, incapable, inefficient
5 Syllables
inadmissible, inappropriate, infelicitous, unworkmanlike, undiplomatic, butterfingered, inexperienced, invertebrate, uninitiate, unallowable, anticlimactic, ineffective, inefficacious, unreflective
6 Syllables
unconsiderate