outturn

The story

1. Proto-Indo-European*úd
2. Proto-Germanic*ūt
3. Proto-Germanic*ūt-
4. Old Englishūt-
5. Middle Englishut-
6. Englishout-
7. Proto-Indo-European*terh₁-
8. Proto-Indo-European*tórh₁nos
9. Proto-Hellenic*tórnos
10. Ancient Greekτόρνος (tórnos)
11. Latintornus
12. Latintornō
13. Proto-West Germanic*turnēn
14. Old Englishturnian
15. Latintornō
16. Old Frenchtorner
17. Middle Englishturnen
18. Englishturn
19. English todayoutturn

From out- + turn.