ECHO
[noun]
1. Greek Mythology: a nymph whose unrequited love for Narcissus caused her to pine away until nothing but her voice remained.
2. a repetition of sound produced by the reflection of sound waves from a wall, mountain, or other obstructing surface.
3. a sound heard again near its source after being reflected.
4. any repetition or close imitation, as of the ideas or opinions of another.
5. a person who reflects or imitates another.
6. a sympathetic or identical response, as to sentiments expressed.
7. any form of repetition, particularly in poetry or music.
8. a remnant or vestige.
[verb]
9. to repeat a sound; reverberate.
10. to repeat or imitate words or sentiments.
Etymology: from Middle English ecco < Latin ēchō < Greek, akin to ēchḗ, “sound”.