soundlessly
adverb uk/ˈsaʊnd.ləs.li/ us/ˈsaʊnd.ləs.li/
无声地，寂静地
without making a sound
Soundlessly, he crept into the hallway, down the stairs, and to the front door. 他无声无息地走进走廊，下了楼梯，来到前门。
When he opened his eyes, the bear had vanished soundlessly into thin air. 当他睁开眼睛时，那只熊已经无声无息地消失在了空气中。
See: soundless
- More examples
- The door opened soundlessly, revealing a small dark room beyond.
- The fellow opened his mouth soundlessly and pointed back down the track.
- Dad frowned, his lips working soundlessly, seemingly unable to answer.