How to pronounce 無解 in Cantonese (4 out of 6):

本質上是無解
It's basically unknown.

Cantonese Sentence Breakdown

本質上 bun2 zat6 soeng6
essentially
si6
is
無解 mou4 gaai2
unsolvable
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