bicyclic

The story

1. Proto-Indo-European*dwóh₁
2. Proto-Indo-European*dwi-
3. Proto-Italic*dwi-
4. Latinbi-
5. Englishbi-
6. Proto-Indo-European*kʷelh₁-redup.
7. Proto-Indo-European*kʷékʷlos
8. Proto-Hellenic*kʷókʷlos
9. Proto-Hellenic*kúklos
10. Ancient Greekκύκλος (kúklos)
11. Ancient Greekκυκλῐκός (kuklĭkós)
12. Classical Latincyclicu
13. Middle Frenchcyclique
14. Frenchcyclique
15. Classical Latincyclicus
16. Englishcyclic
17. English todaybicyclic

From bi- + cyclic.