The story
- Proto-Indo-European*úp
- Proto-Indo-European*upér
- Proto-Germanic*uber
- Old Englishofer-
- Middle Englishover-
- Englishover-
- Old Frenchmaistre
- Latinmagister
- Old Englishmǣġester
- Middle Englishmaister
- Englishmaster
- English todayovermaster
Etymology from Wiktionary, CC BY-SA 4.0.