Meaning of the word "keep schtum" in English

What does "keep schtum" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

keep schtum

US /kiːp ʃtʊm/
UK /kiːp ʃtʊm/
"keep schtum" picture

Idiom

to remain silent; to keep quiet about something

Example:
He promised to keep schtum about what he saw.
The police asked him to keep schtum until they had more information.