The story
- Proto-Indo-European*h₁én
- Proto-Indo-European*h₁entér
- Proto-Indo-European*h₂én
- Proto-Indo-European*dʰeh₁-?
- Proto-Indo-European*(H)n̥dʰí
- Proto-Indo-European*(H)n̥dʰér
- Proto-Germanic*under
- Proto-West Germanic*undar
- Old Englishunder-
- Middle Englishunder-
- Englishunder-
- Proto-Indo-European*weyh₁-?
- Proto-Indo-European*wiHrós
- Proto-Germanic*weraz
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂életi
- Proto-Germanic*alaną
- Proto-Germanic*aldiz
- Proto-Germanic*weraldiz
- Proto-West Germanic*weraldi
- Old Englishweorold
- Middle Englishworld
- Englishworld
- English todayunderworld
Etymology from Wiktionary, CC BY-SA 4.0.