noise·less·ly
adverb/ˈnɔɪzləsli/
/ˈnɔɪzləsli/
(formal)- without making any noise; making only a small amount of noise
无噪音：无噪音；默默地仅使少量噪声成为 - She slipped noiselessly out of the room.
她悄无声息地溜出了房间。
- She slipped noiselessly out of the room.