unimpaired

from WordNet (r) 3.0 (2006)

unimpaired
    adj 1: not damaged or diminished in any respect; "his speech
           remained unimpaired" [ant: {impaired}]

from Moby Thesaurus II by Grady Ward, 1.0

38 Moby Thesaurus words for "unimpaired":
      bright, entire, fresh, harmless, intact, inviolate, mint, perfect,
      pristine, scatheless, sound, unbroken, unbruised, undamaged,
      undefaced, undeformed, undemolished, undestroyed, unfaded,
      unharmed, unhurt, uninjured, unmaimed, unmangled, unmarked,
      unmarred, unscarred, unscathed, unscratched, unshattered,
      unspoiled, untorn, untouched, unwithered, unworn, virgin, whole,
      wholesome