The Collaborative International Dictionary of English v.0.48:

Unhandy \Unhandy\
   See handy.

The Collaborative International Dictionary of English v.0.48:

Unhandy \Un*hand"y\, a.
   Clumsy; awkward; as, an Unhandy man.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

98 Moby Thesaurus words for "unhandy":
   all thumbs, awkward, blunderheaded, blundering, boorish, bulky,
   bumbling, bungling, butterfingered, careless, clownish, clumsy,
   clumsy-fisted, contrary, crosswise, cumbersome, discommodious,
   fingers all thumbs, fumbling, gauche, gawkish, gawky, graceless,
   halting, ham-fisted, ham-handed, heavy-handed, hulking, hulky,
   ill-considered, ill-seasoned, ill-timed, impractical, improper,
   inadept, inappropriate, inapt, inauspicious, incommodious,
   inconvenient, inelegant, inept, inexpedient, inexpert,
   infelicitous, inopportune, intempestive, intrusive, irrelevant,
   late, left-hand, left-handed, loutish, lubberly, lumbering,
   lumpish, mal a propos, maladroit, malapropos, mistimed, oafish,
   off base, out of line, out of phase, out of time, perverse,
   ponderous, premature, sloppy, stiff, too late, too soon,
   troublesome, unapt, unbefitting, uncouth, undexterous, unfacile,
   unfavorable, unfit, unfitting, unfortunate, ungainly, ungraceful,
   unhappy, unlucky, unmanageable, unproficient, unpropitious,
   unready, unripe, unseasonable, unsuitable, untimely, untoward,
   unwieldy, wooden, wrong