endoparasitic

The story

1. Proto-Indo-European*h₁n̥dóm
2. Proto-Hellenic*éndon
3. Ancient Greekἔνδον (éndon)
4. Englishendo-
5. Proto-Indo-European*per-
6. Proto-Indo-European*preh₂-
7. Proto-Hellenic*pərai
8. Ancient Greekπᾰρᾰ́ (părắ)
9. Ancient Greekσῖτος (sîtos)
10. Ancient Greekπαράσιτος (parásitos)
11. Latinparasītus
12. Middle Frenchparasite
13. Englishparasite
14. Englishparasitic
15. English todayendoparasitic

From endo- + parasitic.