1. 自信的：自信 self-confidence | 自信的 self-confident | 自大的 self-important

2. 有自信的：detergent circulator 洗涤液循环泵 | self-confident 有自信的 | well-oiled 醉的,喝醉了的

3. 自信：美德 virtue | 自信 self-confident | 有抱负 ambitious; have aspirations; aim high

4. 自信心：Be better dressed than her穿的比她好些 | Self confident自信心 | Self-secured可靠的

1. 自信的
Someone who is self-confident behaves confidently because they feel sure of their abilities or value.

e.g. She'd blossomed into a self-confident young woman.
她已长大成为了一个自信的年轻女性。

adj

1. showing poise and confidence in your own worth

e.g. hardly more than a boy but firm-knit and self-confident

Synonym: self-assured