bicyclist

The story

1. Proto-Indo-European*dwóh₁
2. Proto-Indo-European*trísinflu.
3. Proto-Indo-European*dwís
4. Proto-Italic*dwis
5. Old Latinduis
6. Latinbis
7. Frenchbi-
8. Proto-Indo-European*kʷelh₁-redup.
9. Proto-Indo-European*kʷékʷlos
10. Proto-Hellenic*kʷókʷlos
11. Proto-Hellenic*kúklos
12. Ancient Greekκύκλος (kúklos)
13. Late Latincyclus
14. Frenchcycle
15. Frenchbicycle
16. Englishbicycle
17. English todaybicyclist

From bicycle + -ist.