自信

ChatGPT’s explanation of “confidence”: Self-confidence refers to an individual’s trust and confidence in his or her own abilities, value, and judgment. It is a psychological state that manifests as a belief in one's ability to successfully complete a task or achieve a goal. People with high self-confidence are generally more able to maintain a positive attitude when faced with challenges and overcome difficulties more easily.
For example:

Xiao Ming felt confident before the exam because he was fully prepared.
Confident speakers are better able to capture the attention of their audience.

Sources of self-confidence can include past successful experiences, support and encouragement from others, and self-reflection and self-affirmation. The establishment of self-confidence is crucial to personal growth and development because it promotes individual performance and adaptability in various situations.
The origin of the word self-confidence can be traced back to the Chinese words "自" and "信", where "自" means oneself and "信" means trust or confidence. These two words combined emphasize trust in one's abilities.

ChatGPT definition