The story
- Proto-Indo-European*sweh₂gʰ-
- Proto-Hellenic*wākʰā́
- Ancient Greekἠχή (ēkhḗ)
- Ancient Greekἠχώ (ēkhṓ)
- Latinēchō
- Medieval Latinēccō
- Middle Englisheccho
- Englishecho
- Proto-Indo-European*lewh₁-
- Proto-Indo-European*lewHs-
- Proto-Germanic*leusaną
- Proto-Germanic*lausaz
- English todayecholess
Etymology from Wiktionary, CC BY-SA 4.0.