Correct

话到嘴边又咽回去了

/ huà dào zuǐ biān yòu yàn huí qù le /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/话到嘴边又咽回去了-Chinese-idioms-Cchatty-5ff225d3-9499-4238-8a61-4172f4230be3-1612778141.jpg

Collocation

1
总是话到嘴边又咽回去了
2
不得不话到嘴边又咽回去了
3
经常话到嘴边又咽回去了
4
有时话到嘴边又咽回去了
5
每次话到嘴边又咽回去了
6
但是话到嘴边又咽回去了
7
可是话到嘴边又咽回去了

Definition

话到嘴边,又咽回去了

Literally means:

hold back words from the tip of the tongue

Actually means:

咽, to swallow.

It figuratively means suddenly holding back the words that were intended to say, hold usually because of inconvenience, lack of courage or change of mind caused by one thing or another.

咽,吞。

比喻原本就要说出来的话突然不说了。常指由于某种原因不便说,不敢说或不想说。

Example

Used as a minor sentence. (作小句)
1
Yàobushì
要不是
huà
dào
zuǐbiān
嘴边
yòu
yàn
huíqu
回去
le
  
,
liáng
雨良
jiù
néng
可能
自己
de
zhēnshí
真实
shēnfèn
身份
shuō
chūlái
出来
le
  

If it hadn't been for the words to the mouth and swallowed back, Yu Liang might have said his true identity.

2
hěn
xiǎng
ràng
bié
guǎn
di
弟弟
de
shì
  
,
yòu
无法
xiàng
父母
jiāodài
交代
  
,
suǒ
所以
hǎo
好几
huà
dào
zuǐbiān
嘴边
yòu
yàn
huíqu
回去
le
  

I wanted him to leave his brother alone, afraid that he would not be able to account to his parents, so several times he said something to his mouth and swallowed it back.

3
huí
jiā
家里
jiù
xiǎng
shàng
马上
ge
哥哥
bìngzhòng
病重
de
shì
gào
告诉
  
,
shì
可是
huà
dào
zuǐbiān
嘴边
yòu
yàn
huíqu
回去
le
  
,
yīnwèi
因为
bude
顾不得
xiūxi
休息
jiù
立刻
gǎn
yuàn
医院
  

As soon as he came home, I wanted to tell him about his brother's serious illness, but he swallowed it back, for fear that he would not rest and rushed to the hospital immediately.