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cocksure

cock·sure

cocksure

pronunciation:
kak shuhr [or] kak shur
part of speech: adjective
definition 1: absolutely sure; having perfect confidence.
synonyms:
certain, positive
antonyms:
dubious, self-doubting
similar words:
confident, steady, sure, unblinking, unflinching
definition 2: overly confident.
synonyms:
cocky, confident, overconfident
antonyms:
modest, self-doubting
similar words:
assured, self-assured
derivations: cocksurely (adv.), cocksureness (n.)