The story
- Proto-Indo-European*né
- Proto-Indo-European*n̥-
- Proto-Germanic*un-
- Proto-West Germanic*un-
- Old Englishun-
- Middle Englishun-
- Englishun-
- Proto-Germanic*hrewwaną
- Proto-West Germanic*hreuwan
- Proto-West Germanic*hreuwu
- Old Englishhrēow
- Middle Englishrewe
- Proto-Indo-European*pleh₁-
- Proto-Indo-European*pl̥h₁nós
- Proto-Germanic*fullaz
- Middle Englishreuful
- Englishrueful
- Englishruefully
- English todayunruefully
Etymology from Wiktionary, CC BY-SA 4.0.