noiseless
adj. 无声的；寂静的
副词：noiselessly 名词：noiselessness
近义词：silent，still，quiet，soundless，muted，hushed，inaudible，peaceful，serene，calm，
英英释义
Adjective
- making no sound;
"th' inaudible and noiseless foot of time"
例句
用作形容词(adj.)
- This new style of air conditioner is noiseless.这种新型空调没有噪音。
- For him the wheel of slumber was wont to turn noiseless and slick and swift.在他看来，时间在睡眠中总是过得很快，静悄悄地就溜走了。