The story
- Proto-Indo-European*dʰwer-
- Proto-Germanic*durz
- Proto-West Germanic*dur
- Old Englishduru
- Middle Englishdore
- Englishdoor
- Proto-Germanic*stapiz
- Proto-Germanic*stappōnąbf.
- Proto-Germanic*stapjaną
- Proto-West Germanic*stappjan
- Old Englishstæppan
- Middle Englishsteppen
- Englishstep
- English todaydoorstep
Etymology from Wiktionary, CC BY-SA 4.0.