Definition of diffident adjective from the Oxford Advanced American Dictionary

 

diffident

 adjective
adjective
NAmE//ˈdɪfədənt//
 
diffident (about something)
 
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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.
NAmE//ˈdɪfədəns//
 
noun [uncountable] She overcame her natural diffidence and spoke with great frankness.
diffidently
 
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adverb
See the Oxford Advanced Learner's Dictionary entry: diffident