Listen, and you will hear it.
- A unit of illuminance
- From the Roman Goddess of night
- A shadowy figure, Nyx aka Nox stood at or near the beginning of creation and mothered other personified deities such as Hypnos (Sleep) and Thanatos (Death), with Erebus (Darkness)
Sound or series of sounds caused by the reflection of sound waves from a surface back to the listener
- Repetition of sounds