susceptible

1 being in a situation where one is likely to meet with harm some people are more susceptible to depression during the winter because of reduced exposure to sunlight Synonyms endangered, exposed, open, sensitive, subject (to), liable, vulnerableRelated Words likely, prone; uncovered, undefended, unguarded, unprotected, unscreened, unsecuredNear Antonyms covered, guarded, protected, safeguarded, screened, secured, sheltered, shielded, wardedAntonyms insusceptible, invulnerable, unexposed, unsusceptible

2 lacking protection from danger or resistance against attack completely susceptible and totally defenseless against the imploring eyes of the puppy in the pet store Synonyms defenseless, exposed, helpless, undefended, unguarded, unprotected, unresistant, vulnerableRelated Words indefensible, untenable; uncovered, unsafe; overcome, preyed (on or upon); disarmed, passive, resistless, unarmed; feeble, frail, weak; abandoned, high and dry, maroonedNear Antonyms defensible; covered, fortified, safe, screened, secure, sheltered; armed, armored; immune, impenetrable, impregnable, invincible, strong, unassailable, unbeatable, unconquerable; almighty, omnipotentAntonyms guarded, invulnerable, protected, resistant, shielded

3 readily taken advantage of having recently lost his job, he was more susceptible to the illusory promises of get-rich-quick schemes Synonyms dewy-eyed, exploitable, gullible (also gullable), naive (or naïve), easy, trusting, unwary, wide-eyedRelated Words credulous, overcredulous, trustful, uncritical, unsuspecting, unsuspicious; artless, genuine, guileless, innocent, simple, unsophisticated, unworldly; fictile, malleable, pliable, pliant; deceivable; acquiescent, agreeable, amiable, obliging; yieldingNear Antonyms critical, cynical, mistrustful, skeptical, suspicious, wary; sophisticated; clear-eyed, clear-sighted, hardheaded; shrewd, street-smart, streetwise