unmanageable

from WordNet (r) 3.0 (2006)

unmanageable
    adj 1: difficult to use or handle or manage because of size or
           weight or shape; "we set about towing the unwieldy
           structure into the shelter"; "almost dropped the unwieldy
           parcel" [syn: {unwieldy}, {unmanageable}] [ant: {wieldy}]
    2: hard to control; "a difficult child", "an unmanageable
       situation" [syn: {unmanageable}, {difficult}] [ant:
       {manageable}]
    3: difficult to solve or alleviate; "uncontrollable pain" [syn:
       {uncontrollable}, {unmanageable}]
    4: incapable of being controlled or managed; "uncontrollable
       children"; "an uncorrectable habit" [syn: {uncontrollable},
       {uncorrectable}, {unmanageable}]

from The Collaborative International Dictionary of English v.0.48

Unmanageable \Unmanageable\
   See {manageable}.

from Moby Thesaurus II by Grady Ward, 1.0

42 Moby Thesaurus words for "unmanageable":
      awkward, beyond control, breachy, bulky, clumsy, contrary,
      contumacious, crosswise, cumbersome, defiant, fractious, hulking,
      hulky, impractical, inconvenient, incorrigible, indocile,
      indomitable, insuppressible, intractable, irrepressible,
      obstreperous, out of hand, perverse, ponderous, recalcitrant,
      refractory, resistant, resisting, restive, shrewish, unbiddable,
      uncontrollable, undisciplined, ungovernable, unhandy, unmalleable,
      unmoldable, unruly, unsubmissive, unwieldy, wild