( tōng )

The English meaning of ( tōng ) is:

1 to go through2 to know well3 (suffix) expert4 to connect5 to communicate6 open7 to clear8 classifier for letters, telegrams, phone calls etc

( tòng )

The English meaning of ( tòng ) is:

1 classifier for an activity, taken in its entirety (tirade of abuse, stint of music playing, bout of drinking etc)