noiseless
adjectiveUK /ˈnɔɪzləs/
US /ˈnɔɪzləs/
Making no sound at all.
The cat walked across the room in a noiseless way.
OTHER MEANINGS
2. Not making any loud or disturbing sound.
They bought a noiseless fan for the bedroom.
3. Free from noise or disturbance.
The library was a noiseless place to study.
4. Operating without audible sound.
The noiseless engine surprised everyone.
5. Characterized by absence of noise.
A noiseless night settled over the town.