THESAURUS
undefended
bare-handed, defenseless, guardless, helpless, unarmed, unarmored, unattended, uncovered, unfortified, ungarrisoned, unguarded, unprotected, unscreened, unsheltered, unshielded, unsuspecting, unwarned, unwatched, weaponless
ROGET THESAURUS
undefended
Submission
N
submission, yielding, nonresistance, obedience, surrender, cession, capitulation, resignation, backdown, obeisance, homage, kneeling, genuflexion, courtesy, curtsy, kowtow, prostration, surrendering, submissive, resigned, crouching, downtrodden, down on one's marrow bones, on one's bended knee, unresistant, unresisting, nonresisting, pliant,
undefended, untenable, indefensible, humble, have it your own way, it can't be helped, amen, da locum melioribus, tempori parendum.