自信的英语单词是confident，名词形式是confidence。confident adj. 确信的，深信的; 有信心的，沉着的; 自信的; n. 知己; 心腹朋友;
比较级：more confident 最高级：most confident 复数：confidents
[例句]
I am confident that everything will come out right in time我坚信一切终究都会好起来。
In time he became more confident and relaxed 。过了一段时间，他变得更加自信、更为放松。
I am confident in him. 我对他有信心。
I think people feel a bit more confident 我想人们应该觉得稍微自信了一点儿。
I admired him for being so confident at his age. 我钦佩他这般年纪就如此自信。
自信——self-confidence 词典释义 self-confidencen.自信；自信心 self-confidentadj.自信的，自持的 believe in oneself自信 assurednessn.确信，确实，自信 be sure of oneselfv.自信；自信满怀 双语例句： 1、我钦佩他这般年纪就如此自信。
I admired him for being so confident at his age. 2、他的自信是对我人生的一种鼓舞。His strength is an inspiration to me in my life 3、他从未表现出他前任的那种近乎傲慢的自信。He has never exhibited the self-confidence, bordering on arrogance, of his predecessor 4、过了一段时间，他变得更加自信、更为放松。In time he became more confident and relaxed 5、我想人们应该觉得稍微自信了一点儿。I think people feel a bit more confident