phytologic

The story

1. Proto-Indo-European*bʰuH-
2. Proto-Indo-European*bʰuHyéti
3. Ancient Greekφῠ́ω (phŭ́ō)
4. Ancient Greekφῠτός (phŭtós)
5. Ancient Greekφῠτόν (phŭtón)
6. Englishphyto-
7. Proto-Indo-European*leǵ-
8. Proto-Indo-European*lóǵos
9. Proto-Hellenic*lógos
10. Ancient Greekλόγος (lógos)
11. English todayphytologic

From phyto- + -logic.