How to pronounce 凹凸 in Cantonese (3 out of 4):

機背就用咗凹凸坑紋設計
The back of the plane was designed with a convex crater pattern.

Cantonese Sentence Breakdown

gei1
machine
engine
opportunity
intention
aircraft
pivot
crucial point
flexible (quick-witted)
organic M: 台tái [台]
witty
handphone
bui6
to learn by heart
to recite from memory
unlucky (slang)
hard of hearing
out of date
unfashionable
ignorant
remote
zau6
at once
right away
only
just (emphasis)
as early as
already
as soon as
then
in that case
as many as
even if
to approach
to move towards
to undertake
to engage in
to suffer
subjected to
to accomplish
to take advantage of
to go with (of foods)
with regard to
concerning
to yield oneself to
to compromise
will do
no other
to let
allow something be a certain way
according to
supposing
either…or
exactly
precisely
definitely
to accommodate
has
have been
to give in
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
zo2
Cantonese particle equivalent to 了le [了] or 过guò [过], a particle used to indicate perfective aspect for continuous state
completed actions
past events
change of situation
凹凸 ngau1 dat6
uneven
haang1
hole
pit
tunnel
to defraud
to bury alive
to frame
man4
line
trace
mark
pattern
grain (of wood etc)
streak
stripe
wrinkle
vein
設計 cit3 gai3
design