noiseless
無噪音
Noise·less, a. Making, or causing, no noise or bustle; without noise; silent; as, the noiseless foot of time.
So noiseless would I live. --Dryden.
-- Noise*less*ly, adv. -- Noise*less*ness, n.
◄ ►
noiseless
adj : making no sound; "th' inaudible and noiseless foot of time"-
Shakespeare