| 通信 |
tōng xìn |
to correspond (by letter, email etc) / to send or receive messages through telecommunications |
| 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) |
| 信 |
xìn |
letter / mail / CL:封 / to trust / to believe / to profess faith in / truthful / confidence / trust / at will / at random |