How to pronounce 反口 in Cantonese (3 out of 6):

應承咗人嘅嘢都可以反口
Anything you promise can be countered.

Cantonese Sentence Breakdown

應承 ying3 sing4
promise
zo2
Cantonese particle equivalent to 了le [了] or 过guò [过], a particle used to indicate perfective aspect for continuous state
completed actions
past events
change of situation
jan4
man
person
people M: 个gè [个]
位wèi [位]
mankind
someone else
koi3
indignant
generous
to sigh (with emotion)
je5
thing
matter (Cantonese)
see also 乜嘢miēyě [乜嘢]
a derogatory way to refer to a person
heroin
dou1
all
both
entirely
(used for emphasis) even
already
(not) at all
metropolis
capital
big city
the whole
elegant
refined
without exception
also
too
still
used in a sentence to add an inference or interrogative tone
可以 ho2 ji5
(adjective) so so
反口 faan2 hau2
go back on one's word