diffident [adjective]: lacking self-confidence; timid, shy; hesitant.
Example: Everybody thought he was too diffident to succeed in politics.
Related words: diffidently [adverb], diffidence [noun]
Synonyms: bashful, chary, coy, demure, doubtful, flinching, hesitant, humble, insecure, meek, modest, reluctant, reserved, retiring, self-conscious, self-effacing, sheepish, shy, timid, unassuming, unsure
Antonyms: bold, brash, bumptious, confident, cocksure, cocky, hubristic, overconfident, pushy, self-assured, sure, swaggering, vain
Tags: GRE
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