通
tōng
I v.
1) communicate/connect (with)
2) join; share
3) understand thoroughly; master
4) be interchangeable with ...
5) open up or clear out by poking/jabbing
6) notify; tell
II suf.
authority; expert
中国通 China expert
III s.v.
logical; coherent; well-constructed (of sentences)
这个句子是通的，不必改了。 This is a coherent sentence, it needs no correction.
IV m.
for telegrams
V n.
Surname
VI b.f.
1) open; through (相通, 打通)
2) general; common (共通)