lacking confidence in one's own ability, worth, or fitness; timid; shy.
restrained or reserved in manner, conduct, etc.
Origin: 1425–75; late Middle English Related forms
< Latin diffīdent-
(stem of diffīdēns
mistrusting, despairing present participle of diffīdere
), equivalent to dif- dif-
trust + -ent- -ent
self-conscious, self-effacing, abashed, embarrassed, modest, unassuming, unconfident. See shy1