IPA: /ˈɛkəʊlɛs/
KK: /ˈɛkoʊlɛs/
Describing a place or environment that does not produce any echo sounds.
The cave was echoless, making it eerily quiet inside.
Echoless → It is formed from "echo" (from Greek "ēchō", meaning sound or reverberation) and "-less" (meaning without). The word "echoless" means without sound or reverberation.
Think of 'echo' as a sound that reflects back, and when something is 'echoless', it means there is no sound reflecting back.