How to pronounce 炆 in Cantonese (5 out of 6):

用長時間
Cooked for a long time.

Cantonese Sentence Breakdown

jung6
to use
to employ
to have to
to eat or drink
expense or outlay
usefulness
hence
therefore
to apply
to operate
function
to spend
to make use
to serve as
to eat
to drink
with
to need
to exert
effect
with this
長時 coeng4 si4
for a long time
haan4
an alternative form for 閒, idle
man6
slow cook
zyu2
to cook
to boil
to give someone a hard time