v. 25B6; verb
quieten the children down : SILENCE, hush, shush, quiet; informal shut up.
her companions quietened : FALL SILENT, stop talking, break off, shush, hold one's tongue; informal shut up, clam up, shut it, pipe down, shut one's mouth, put a sock in it, button it.
he tried to quieten manic patients : PACIFY, calm (down), soothe, subdue, tranquillize, relax, comfort, compose.