quiet
(adj) : with little or no sound; denoting absence of disturbing noise; having little motion or activity; calm
"the sea was quiet; a quiet night at home; all quiet on the Western front."
(v) : to become quiet, silent, still, tranquil, calm; to cause someone to become quiet
(n) : the absence of sound; quietness; the absence of movement; stillness, tranquility
synonyms: calmness, order, sound property more», composure, calm, equanimity