vulnerable
bare-handed
defenseless
exposed
guardless
helpless
naked
unarmed
unarmored
unattended
uncovered
unfortified
ungarrisoned
unguarded
unprotected
unscreened
unsheltered
unshielded
unsuspecting
unwarned
unwatched
weaponless
assailable
foolproof
impassable
impervious
invulnerable
nonexistent
northwestern
powerless
undamaged
undetectable
uninhabitable
uninhabited
unpopulated
unrecognizable
untenanted
unworked
valueless