How to pronounce 打磨 in Cantonese (6 out of 7):

固定到塊木, 打磨返佢嘅表面
It's attached to the wood and it's grinding back to the surface.

Cantonese Sentence Breakdown

固定 gu3 ding6
(adjective) Stable (income, job, etc.)
dou3
to (a place)
until (a time)
up to
to go
to arrive
(verb complement denoting completion or result of an action)
been to
a particle used after a verb or adjective to indicate degree
extent
faai3
lump (of earth)
chunk
piece
classifier for pieces of cloth, cake, soap etc
(coll.) classifier for money and currency units
gap
vagina
cunt
muk6
tree
wood
coffin
wooden
simple
numb
one of the eight ancient musical instruments 八音bāyīn [八音]
dull
打磨 daa2 mo2
polish
faan1
to return (to)
to revert to
to restore
to go back
to come back
heoi5
he
she
it (Cantonese)
Mandarin equivalent: 他tā [他]
koi3
indignant
generous
to sigh (with emotion)
表面 biu2 min6
surface