undefended

from WordNet (r) 3.0 (2006)

undefended
    adj 1: not defended or capable of being defended; "an open
           city"; "open to attack" [syn: {assailable},
           {undefendable}, {undefended}, {open}]

from The Collaborative International Dictionary of English v.0.48

Undefended \Undefended\
   See {defended}.

from Moby Thesaurus II by Grady Ward, 1.0

19 Moby Thesaurus words for "undefended":
      bare-handed, defenseless, guardless, helpless, unarmed, unarmored,
      unattended, uncovered, unfortified, ungarrisoned, unguarded,
      unprotected, unscreened, unsheltered, unshielded, unsuspecting,
      unwarned, unwatched, weaponless

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