How to pronounce 不得而知 in Cantonese (5 out of 7):

仔呢真系不得而知
He didn't know that.

Cantonese Sentence Breakdown

zi2
meticulous
ni1
this
zan1
really
truly
indeed
real
true
genuine
actual
a surname
true, original, unspoiled character of man
exact copy of something
natural instincts
inherent quality
hai6
department
不得而知 bat1 dak1 ji4 zi1
remains unknown
haa5
once