FreeVocabulary
Diffident
/ˈdɪf.ɪ.dənt/ adjective hardLacking confidence in oneself; shy and hesitant to assert an opinion.
The diffident intern hesitated to share her idea, even though it turned out to be the best one in the meeting.
Memory Trick
'Dif-' (apart) plus a root meaning trust (as in 'confident') — a diffident person's trust in themselves has been pulled apart, leaving only hesitation.