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Etymology
· Ancient Greek
ἠχώ
4 English words descend from Ancient Greek
ἠχώ
, most common first.
echo
A reflected sound that is heard again by its initial observer.
anechoic
Lacking echoes; particularly, designed to absorb sound.
echo-
Synonym of sono-.
echolalia
The involuntary repetitive echoing of words or phrases spoken by another person; either immediate or delayed.