unprotected

from WordNet (r) 3.0 (2006)

unprotected
    adj 1: lacking protection or defense [ant: {protected}]

from The Collaborative International Dictionary of English v.0.48

Unprotected \Unprotected\
   See {protected}.

from Moby Thesaurus II by Grady Ward, 1.0

31 Moby Thesaurus words for "unprotected":
      aidless, bare-handed, defenseless, fatherless, friendless,
      guardless, guideless, helpless, insecure, leaderless, motherless,
      pregnable, unarmed, unarmored, unattended, uncovered, undefended,
      unfortified, unfriended, ungarrisoned, unguarded, unsafe,
      unscreened, unsheltered, unshielded, unsuspecting, untenable,
      unwarned, unwatched, vulnerable, weaponless