通往

通往	tōng wǎng	to lead to
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)
往	wǎng	to go (in a direction) / to / towards / (of a train) bound for / past / previous
往	wǎng	old variant of 往