Answer: quiet

AnswerCrossword Clue
QUIETLibrary request
QUIETGreene's "The ... American": 1955
QUIETLibrarian's admonition
QUIETHospital sign
QUIETPeace's companion
QUIETSettled
QUIETStill
QUIETHospital caution
QUIETZipped, so to speak
QUIET"Shush!"
QUIET"Zip it!"
QUIETAngry teacher's cry
QUIETSleepy
QUIETPeace's partner
QUIETPeacefully silent
QUIETTranquil
QUIETUndisturbed
QUIETLike most libraries
QUIETQuell
QUIETPartner of peace?
QUIETMuted
QUIETLull
QUIETClassroom command
quietsilence
quietto silence (to make quiet) / free from noise
quietsilent
quietthe quality or state of being quiet (see quiet)tranquillity
quietrestrained
quietto make or become quiet
quietpeaceful
quiettranquillity
quietbeing at rest
QUIETSerene
QUIETPartner of peace
QUIETLike a library
QUIET"Shhh!"
QUIETHushed
QUIETPeace partner
QUIETAdmonition from a librarian
QUIETPacify