The story
- Proto-Indo-European*úp
- Proto-Indo-European*upér
- Proto-Germanic*uber
- Old Englishofer-
- Middle Englishover-
- Englishover-
- Proto-Indo-European*bew-der.?
- Proto-Indo-European*bʰel-der.?
- Latinbulla
- Latinbulliō
- Old Frenchboillir
- Middle Englishboillen
- Englishboil
- English todayoverboil
Etymology from Wiktionary, CC BY-SA 4.0.