dǎ​qì

encourage

打气 (打氣) dǎ​qì
encourage verb
to encourage; to boost morale

Before the game, the coach kept cheering the players up.

inflate verb
to inflate; to pump up

My bike tire is flat and needs to be pumped up.

Frequency

Movie subtitles
2.09 per million appears in 1% of films
Written text
2.38 per million

Sources

Definitions
CC-CEDICT