How to pronounce 無緣無故 in Cantonese (6 out of 8):

那些字常常無緣無故地變調
Those words often change their tone.

Cantonese Sentence Breakdown

那些 naa5 go2
those
zi6
letter
symbol
character
word M: 个gè [个]
courtesy or style name traditionally given to males aged 20 in dynastic China
to betroth a girl
wordage
calligraphy works
contract
常常 soeng4 soeng4
(adverb) Always
無緣無故 mo4 jyun4 mou4 gu3
without cause and without reason
deng6
-ly
structural particle: used before a verb or adjective, linking it to preceding modifying adverbial adjunct
earth
soil
ground
region
the base of the coffin
變調 bin3 diu6
change tone (in speech or singing)