How to pronounce 通書 in Cantonese (2 out of 3):

通書和通輸同音
Transmission and transmission and sound.

Cantonese Sentence Breakdown

通書 tung1 syu1
letter
wo4
and
tung1
to go through
to know well
(suffix) expert
to connect
to communicate
open
to clear
classifier for letters, telegrams, phone calls etc
to pass through
common
unobstructed
to reach
to notify
general
whole
throughout
logical
coherent
to unblock
syu1
to lose
to transport
to donate
to enter (a password)
to pay
to contribute
to convey
to transmit
同音 tung4 jam1
homophonic