How to sign: refuse to talk or stop talking; fall silent
"The children shut up when their father approached";
Similiar / Same: clam up, belt up, button up, be quiet, keep mum, close up, dummy up
How to sign: 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";
Similiar / Same: lock away, put away, shut away, lock in, lock up, lock
Categories: confine
How to sign: cause to be quiet or not talk
"Please silence the children in the church!";
See also: whitewash, sleek over, hush up, gloss over
Similiar / Same: silence, hush, still, hush up, quieten
Categories: conquer, curb, inhibit, stamp down, subdue, suppress
Within this category: gag, lull, shout down, shush