The story
- Proto-Italic*wre-
- Latinre-
- Latinretrō
- Englishretro-
- Proto-Hellenic*glṓt͏̌t͏̌ā
- Ancient Greekγλῶσσᾰ (glôssă)
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Englishglossal
- English todayretroglossal
Etymology from Wiktionary, CC BY-SA 4.0.