quieter
qui-et-er
adjective
More silent or less noisy than something else, or more peaceful.
"The library is much quieter today."
Thesaurus
Synonyms: tranquillize, tranquillise, tranquilize, calm down, still, lull, quiet, calm, quieten, serenity, tranquillity, tranquility
Antonyms: active, agitate, charge, charge up, commove, excite, louden, noisy, rouse, sound, turn on, unquiet