jīng​tōng HSK7

master

精通 jīng​tōng
master verb
to be thoroughly proficient in or have a deep understanding of a subject, language, or skill

He is proficient in multiple languages, which is a great advantage in international trade.

Frequency

Movie subtitles
3.99 per million appears in 2% of films
Written text
6.06 per million

Details

HSK 2.0
Level 6
HSK 3.0
Level 7

Sources

Definitions
CC-CEDICT