dǐ​qì

confidence

底气 (底氣) dǐ​qì
confidence noun
inner strength or self-assurance derived from one's resources, abilities, or support

With his family's support, he felt more confident going into the interview.

lung capacity noun
physical strength of one's breath, often in the context of singing or speaking

This singer has great lung capacity and hits the high notes with ease.

Frequency

Movie subtitles
0.390 per million appears in 0% of films
Written text
3.62 per million

Sources

Definitions
CC-CEDICT