ultradistant

The story

1. Proto-Indo-European*h₂el-
2. Latinūls
3. Latinultrā
4. Englishultra-
5. Proto-Indo-European*dwóh₁
6. Proto-Indo-European*trísinflu.
7. Proto-Indo-European*d(w)is-
8. Proto-Italic*dis-
9. Latindis-
10. Proto-Indo-European*steh₂-
11. Proto-Indo-European*sth₂éh₁yeti
12. Proto-Italic*staējō
13. Proto-Italic*staēō
14. Latinstō
15. Latindistō
16. Latindistāns
17. Old Frenchdistant
18. Middle Englishdistaunt
19. Englishdistant
20. English todayultradistant

From ultra- + distant.