1620s, originally an attribute of God (translating Greek autakreia), from self- + sufficiency. Of mortals, self-sufficient "able to supply one's own needs" is recorded from 1580s.
权威例句
1. He has never exhibited the self-confidence, bordering on arrogance, of his predecessor.
他从未表现出他前任的那种近乎傲慢的自信。
2. I felt so self-conscious under Luke's mother's intense gaze.
在卢克母亲审视的目光下,我感到极不自在。
3. She has now changed into a happy, self-confident woman.
如今她已经变成一个快乐、自信的女人。
4. He is being treated for a self-inflicted gunshot wound.
他因开枪自残受伤正在接受治疗。
5. She summoned up all her pity for him, to smother her self-pity.