huǒ​qì

anger

火气 (火氣) huǒ​qì
anger noun
irritability or a hot temper

He has been very irritable lately, always losing his temper for no reason.

internal heat noun
a concept in Traditional Chinese Medicine referring to an imbalance that causes inflammation or feverish symptoms

Staying up late can easily cause internal heat to rise.

Frequency

Movie subtitles
1.52 per million appears in 1% of films
Written text
2.71 per million

Sources

Definitions
CC-CEDICT