wheelflat

The story

1. Proto-Indo-European*kʷelh₁-redup.
2. Proto-Indo-European*kʷekʷléh₂
3. Proto-Germanic*hweulō
4. Old Englishhwēol
5. Middle Englishwhel
6. Englishwheel
7. Proto-Germanic*flataz
8. Old Norseflatr
9. Middle Englishflat
10. Englishflat
11. English todaywheelflat

From wheel + flat.