quieten
hush *
quiet ***
quiesce
quiet down
pipe down

There is now no chance that things will quiet down this year.

Experts say there are ways to quiet down chatterboxes.

Several of the guys were pretty boisterous, and the bus driver had to tell them to quiet down several times.

David asked him to quiet down a few times and finally told him to leave the table.

It was quiet, down there in the dark.

"Gone very quiet down there all of a sudden," he said.

"Me, too, but it sure did quiet down the hyper-religious folks in the ship."

He started writing to quiet down his fourth grade students, who loved his stories and encouraged him to make "real" books.

We'll have to let her quiet down a while.