dǎ​tōng HSK7

connect

打通 dǎ​tōng
connect verb
to successfully put through a telephone call

It took several tries before I could get through to him on the phone.

establish contact verb
to open up channels, networks, or relationships for communication or business

The company is working to open up sales channels in various regions.

unblock verb
to open up access or clear an obstruction in a physical passage

The tunnel was finally completed.

Frequency

Movie subtitles
2.77 per million appears in 1% of films
Written text
5.81 per million

Details

HSK 3.0
Level 7

Sources

Definitions
CC-CEDICT