shut up

adjective

1
cause to be quiet or not talk
Please silence the children in the church!
2
refuse to talk or stop talking; fall silent
The children shut up when their father approached
3
place in a place where something cannot be removed or someone cannot escape
The parents locked her daughter up for the weekend
She locked her jewels in the safe

Also useful for “shut up”:Crossword— Multi-word entries show up in clues