diffident
adj.
mid-15c., from Latin diffidentem (nominative diffidens), present participle of diffidere (see diffidence). Related: Diffidently.
〔蒋〕[fid信任，-ent形容词后缀] 缺乏自信的
〔李〕[dif-(dis-)=not不；fid=to trust信任；-ent a.=-ing……的→“not trusting (oneself)不信任（自己）的”→] a. distrusting;lacking in self-reliance没有信心的；缺乏自信的