| 精通 |
jīng tōng |
to be proficient in / to master (a subject) |
| 精 |
jīng |
essence / extract / vitality / energy / semen / sperm / mythical goblin spirit / highly perfected / elite / the pick of sth / proficient (refined ability) / extremely (fine) / selected rice (archaic) |
| 通 |
tōng |
to go through / to know well / (suffix) expert / to connect / to communicate / open / to clear / classifier for letters, telegrams, phone calls etc |
| 通 |
tòng |
classifier for an activity, taken in its entirety (tirade of abuse, stint of music playing, bout of drinking etc) |