tōng​qì

to ventilate

通气 通氣 tōng//qì
to ventilate
to allow air to flow or circulate; to aerate or breathe freely
to keep informed
to exchange information or keep each other in the loop; to give a heads-up
to supply gas
to begin the supply of utility gas or heating through a pipe system
to be sensible
(literary or colloquial) to be reasonable or understand how things work; sensible
to collude
to work together in secret; to be in cahoots or act in collusion

Frequency

Movie subtitles
1.10 per million appears in 1% of films
Written text
5.20 per million

Sources