Question

to bite your tongue - I had to bite my tongue when he said he how worried he was. He's such a liar!  - You'll have to learn to bite your tongue. You can't just go shouting at the teachers every time they say something that annoys you.  - I have had to bite my tongue on so many occasions that I'm surprised it's still in my mouth at all!  - She bit her tongue rather than get right in his face and scream, "Why didn't you say so?"

Accepted Answer

to not say what you would really like to say; to keep quiet

Idiom	to bite your tongue
Definition	to not say what you would really like to say; to keep quiet
Examples	- I had to bite my tongue when he said he how worried he was. He's such a liar! - You'll have to learn to bite your tongue. You can't just go shouting at the teachers every time they say something that annoys you. - I have had to bite my tongue on so many occasions that I'm surprised it's still in my mouth at all! - She bit her tongue rather than get right in his face and scream, "Why didn't you say so?"

Bite Tongue I Quiet Worried Liar Learn Shouting