eigendimension

The story

1. Proto-Indo-European*h₂eyḱ-
2. Proto-Indo-European*h₂eh₂óyḱe
3. Proto-Germanic*aiganą
4. Proto-Germanic*aiganaz
5. Proto-West Germanic*aigan
6. Old High Germaneigan
7. Middle High Germaneigen
8. Germaneigen
9. Englisheigen-
10. Proto-Indo-European*dwóh₁
11. Proto-Indo-European*trísinflu.
12. Proto-Indo-European*d(w)is-
13. Proto-Italic*dis-
14. Latindis-
15. Proto-Indo-European*med-
16. Proto-Indo-European*meh₁-
17. Proto-Italic*mētis
18. Latinmētior
19. Latindīmētior
20. Latindīmēnsiō
21. Englishdimension
22. English todayeigendimension

From eigen- + dimension.