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

但你叫他死開
But you let him die.

Cantonese Sentence Breakdown

daan6
but
nei5
you (informal, as opposed to courteous 您nín [您])
can be used to refer to an unspecified person
叫他 giu3 taa1
call him
死開 sei2 hoi1
piss off; get lost [colloquial]