How to pronounce 密封 in Cantonese (8 out of 9):

不是密封
It's not sealed.

Cantonese Sentence Breakdown

不是 bat1 si6
is not
密封 mat6 fung1
seal
dik1
of
~'s (possessive particle)
(used after an attribute)
(used to form a nominal expression)
(used at the end of a declarative sentence for emphasis)
truly
really
indeed
target
to lift up
few
small
to fetch
to move
to get
to pick up
to force