confident，英 ['k?nf?d?nt]，美 ['k?nf?d?nt]
adj. 自信的；有信心的；有把握的
副詞: confidently
例句：For my own part, being nice about appearance keeps me confident.
就我而論，註重儀表使我自信。
反義詞
diffident，英 ['d?f?d?nt]，美 ['d?f?d?nt]
adj. 無自信的；客客氣氣的；羞怯的
副詞: diffidently
例句：He was too diffident to express his opinion.
他太不自信，不敢發表自己的見解。