noiseless (adjective)

1. The ninja moved noiselessly through the shadows, undetected by their enemies.

2. In the suspenseful scene, the protagonist carefully opened the door noiselessly to avoid attracting attention.

3. During the silent meditation, everyone in the monastery remained noiseless to focus on their spiritual practice.

4. The ghostly figure floated noiselessly across the room, sending shivers down the spines of those who witnessed it.