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

美國看見中國還未投降,又說簽協議,又反口不簽
The United States saw China not surrendering, and they signed the deal, and they refused to sign it.

Cantonese Sentence Breakdown

美國 mei5 gwok3
America
看見 hon3 gin3
(adverb) Initially
中國 zung1 gwok3
China
還未 waan4 mei6
not yet
投降 tau4 hoeng4
surrender
jau6
(once) again
also
both... and...
and yet
(used for emphasis) anyway
and (used in the context when talking about fractions)
in adddition
syut3
to speak
to say
to explain
to scold
to tell off
a theory (usually in compounds such as 日心说 heliocentric theory)
to criticize
to try to influence someone to do something
to mean
cim1
to sign one's name
visa
variant of 签qiān [签]
to endorse
slip of paper
bamboo slips for drawing lots of divinations
協議 hip3 ji5
agreement
反口 faan2 hau2
go back on one's word
fau2
same as否 (dated used in old text only), not
no
negative prefix
a final particle