in a vulnerable manner

immune to attack; impregnable

susceptibility to injury or attack

subject to being conquered or overcome

lacking protection or defense

involving or causing danger or risk; liable to hurt or harm

lacking in security or safety

(often followed by `of' or `to') yielding readily to or capable of

not defended or capable of being defended

vulnerable to danger especially of discredit or suspicion

lacking protection or support

(of flora or fauna) in imminent danger of extinction

not able to be protected against attack