diffident發音dif- 分開+fid 信任+-ent 形容詞→不具信任的展開收合dif-字首分開fid字根信任-ent字尾形容詞字面：不具信任的對自己缺乏信任，即缺乏自信、畏縮羞怯。形容詞1缺乏自信的、畏縮的、沒把握的正式He was too diffident to ask for a raise.他太沒自信，不敢開口要求加薪。2羞怯的、拘謹的、靦腆的She gave a diffident smile and looked at the floor.她靦腆地笑了一下，低頭看著地板。3謙抑的、含蓄的正式The author remains diffident about his own achievements.這位作家談到自己的成就時始終十分謙抑。