Correct

翻悔

/ fān huǐ / 
Strokes

Definition

to renege/to go back (on a deal)/to back out (of a promise)

Example

As a Verb

renege on; back out (of a commitment, promise, etc); go back on one's word

1
Yīdàn
一旦
dāying
答应
  
,
jiù
就
biè
别
fān
翻
huǐ
悔
  
。

Once you've agreed, don't try to back out.

2
Tóngyì
同意
le
了
yòu
又
fān
翻
huǐ
悔

renege on one's agreement