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