das Echo, -s

The German word "Echo" is a noun that means "echo" in English; it refers to the phenomenon of sound reflection, where sound waves bounce back to the listener after hitting a surface. The term is derived from the ancient Greek "ēkhō," which conveys a similar meaning.

In terms of similar words, "Nachhall" (reverberation) refers to the persistence of sound after the original sound source has ceased, whereas "Widerhall" can denote a more general response or reflection, not limited to sound.

The difference lies in that "Echo" specifically refers to the exact repetition of sound due to reflection, while "Nachhall" involves the lingering sound effect, and "Widerhall" can apply to various types of responses beyond audio.