anatomiless

The story

1. Proto-Indo-European*h₂en-
2. Proto-Hellenic*aná
3. Ancient Greekᾰ̓νᾰ́ (ănắ)
4. Ancient Greekἀνα- (ana-)
5. Proto-Indo-European*temh₁-
6. Ancient Greekτέμνω (témnō)
7. Ancient Greekἀνατέμνω (anatémnō)
8. Ancient Greekἀνατομή (anatomḗ)
9. Latinanatomia
10. Old Frenchanatomie
11. Middle Englishanatomie
12. Englishanatomy
13. Proto-Indo-European*lewh₁-
14. Proto-Indo-European*lewHs-
15. Proto-Germanic*leusaną
16. Proto-Germanic*lausaz
17. English todayanatomiless

From anatomy + -less.