ultra-quiet
adjective
(alsoultraquiet)uk/ˌʌl.trəˈkwaɪ.ət/us/ˌʌl.trəˈkwaɪ.ət/extremelyquiet; making very little or nosound:
Thefanhas an ultraquietmotorso that youhardlynoticeit isrunning.
Thenavyusessonartodetectultra-quietsubmarinesthat might belurkinginnearbywaters.
- Thehikingtrailislocatedin an ultra-quiet,denselywoodedareawithviewsofravinesandstreams.
- Publictransportisprovidedby afleetof ultra-quietelectricbusesthattravelthroughoutthecity.
- Thetinyhoveringobjectin theskyturnedout to be an ultraquietsurveillancedrone.
Peaceful and tranquil
- balm
- beatitude
- consonance
- coolness
- dust
- non-militant
- peaceable
- peaceably
- peaceful
- peacefully
- peacefulness
- restfulness
- sequestered
- sleepiness
- sleepy
- soothing
- soothingly
- the calm before the stormidiom
- the dust settlesidiom
- the lull before the stormidiom