A English word that resembles the meaning "Not speaking a word intentionally"?

Question

A English word that resembles the meaning "Not speaking a word intentionally"?

In Tamil its called a s "Maoouna Viratham", does any body knows it...

for easy understanding, Hunger strike is not eating anything; similarly what is it for not speaking anything!!!

Answer 1

"Mauna viratham" : 'Vow of silence'

Answer 2

To get a vow of silence/To remain in silence/To keep quiet.

Answer 3

Vow of silence?