The story
- Germanum-
- Proto-Indo-European*ḱel-
- Proto-Indo-European*ḱlew-
- Proto-Indo-European*ḱlutós
- Proto-Germanic*hlūdaz
- Proto-West Germanic*hlūd
- Old High Germanlūt
- Middle High Germanlūt
- GermanLaut
- GermanUmlaut
- Englishumlaut
- English todayumlauted
Etymology from Wiktionary, CC BY-SA 4.0.