/ˈɛkoʊ/·noun·c. 1382 CE — Wycliffe's Bible translation uses 'echo' in a mythological gloss; broader literary attestation in Chaucer's era, late 14th century·Established
Origin
From Greek ēkhō (ἠχώ, reflected sound), named for the nymph Ovid immortalised in the Metamorphoses — condemned to repeat others' words, she dissolved into pure voice — the word carries a contested PIE root possibly linking it to Latin vāgīre and Old English swōgan, while its verb form ēkhein also underliescatechism, making echo and oral instruction unlikely kin.
Definition
A repetition of sound produced by the reflection of sound waves from a surface, or figuratively the close imitation of another's words, ideas, or style.
The Full Story
GreekAncient Greek, attested from c. 7th century BCE; English borrowing c. 14th century CEwell-attested
The word 'echo' derives from Ancient Greek ēkhō (ἠχώ), itself related to ēkhos (ἦχος), meaning 'sound, noise, reverberation'. The Greek term is most famously personified in myth: Ēkhō was an Oreiad nymph who, according to Ovid's Metamorphoses (composed c. 2–8 CE, Book III, lines 356–401), was cursed by Hera to repeat only the last words spoken to her, as punishment for distracting the goddess with lengthy conversation while Zeus consorted with other nymphs. Enamoured of Narcissus and rejected, Echo wasted away until only her voice remained — a perfect
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Ovid's Metamorphoses handedEnglish two words from a single myth: Echo, the nymph cursed to repeat, gave us 'echo'; Narcissus, the youth who loved only his own reflection, gave us 'narcissism'. But the strangergift came elsewhere — the Greek verb ēkhein (to sound) combined with kata- (down) to form katēkhein, 'to sound down into', meaning oral instruction. That word became 'catechism'. The call-and-response form of the catechism is, structurally, an echo:
noise'). Latin borrowed the Greek word directly as echo (feminine noun, first declension), using it both in the mythological sense and the acoustic sense. From Latin, Middle English acquired echo in the 14th century, initially in literary and mythological contexts. By the 16th century the word functioned freely as a common noun for sound reflection. The verb 'to echo' — meaning to resound, repeat, or reverberate — is attested from the late 16th century. Technical extension into acoustics, sonar, and computing represents the most recent semantic layer. The same Greek verb ēkhein (to sound) combined with kata- (down) produced katēkhein ('to sound down', then 'to instruct orally'), giving English 'catechism' — making echo and catechism etymological siblings. Key roots: *swāgʰ- (Proto-Indo-European: "to resound, make noise, cry out"), ēkhō / ēkhos (ἠχώ / ἦχος) (Ancient Greek: "sound, resonance, reverberation"), *wekʷ- (Proto-Indo-European: "to speak, to sound (related root, yields Latin vox, vōx)").