adj.無聲的；寂靜的
This new style of air conditioner is noiseless. 這種新型空調(diào)沒有噪音。
For him the wheel of slumber was wont to turn noiseless and slick and swift. 在他看來，時(shí)間在睡眠中總是過得很快，靜悄悄地就溜走了。
adv.靜靜地；輕輕地
