Definition of diffident adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈdɪfɪdənt//
; NAmE NAmE//ˈdɪfɪdənt//
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diffident (about something) not having much confidence in yourself; not wanting to talk about yourself synonym shy a diffident manner/smile He was modest and diffident about his own success. She felt diffident about speaking in public. Greg was the quiet, diffident type. See related entries: Nervous Word Originlate Middle English (in the sense ‘lacking confidence or trust in someone or something’): from Latin diffident- ‘failing in trust’, from the verb diffidere, from dis- (expressing reversal) + fidere ‘to trust’.
See the Oxford Advanced American Dictionary entry: diffident