In predicative use. With to, †upon. Likely to suffer from or be affected by; vulnerable or exposed to.

Exposed or open to, prone to, or liable to suffer from something damaging, deleterious, or disadvantageous.

figurative. Open to attack, vulnerable, assailable; accessible.

Liable or open to attack or injury. Obsolete. rare.

Subject to chance or accident; frail, uncertain, precarious. Obsolete.

Exposed to attack; unprotected, very vulnerable; off one's guard. Frequently figurative, esp. in to leave (oneself) wide open (to something).

Liable, subject, exposed, or open to a thing (esp. something actually or possibly harmful). (The usual sense before the 19th cent.) Now rare.

Capable of being assailed; open to assault or attack.

Exposed or subject to, or likely to suffer from (something prejudicial); in older use with wider sense, †subject to the operation of (any agency)…

= obnoxious, adj. 1a. Obsolete.

Capable of being wounded; vulnerable.

Without to or infinitive. Liable or exposed to harm. Obsolete. rare.

Liable to a fatal wound. Obsolete.

= infectable, adj. Also: †capable of infecting, infectious (obsolete).

That may suffer injury or loss. Obsolete.

Able to be attacked (in various senses); vulnerable to attack.

figurative. Open to attack or injury of a non-physical nature; esp., offering an opening to the attacks of raillery, criticism, calumny, etc.

Liable to be prejudiced or injured. Obsolete. rare.

that may be threatened.

Capable of being swindled or victimized (see do, v. 20). Obsolete. rare.

Susceptible to infection or a particular infection; capable of being infected (by or with a disease, organism, etc.). Also figurative. Cf. infectible…