pantless

The story

1. Proto-Indo-European*peh₂-
2. Proto-Indo-European*ph₂énts?
3. Proto-Hellenic*pánts
4. Ancient Greekπᾶς (pâs)
5. Ancient Greekἔλεος (éleos)
6. Ancient Greekἐλεέω (eleéō)
7. Ancient Greekἐλεήμων (eleḗmōn)
8. Ancient GreekΠαντελεήμων (Panteleḗmōn)
9. ItalianPantalone
10. Frenchpantalon
11. Englishpantaloon
12. Englishpantaloons
13. Englishpantsbf.
14. Englishpant
15. Proto-Indo-European*lewh₁-
16. Proto-Indo-European*lewHs-
17. Proto-Germanic*leusaną
18. Proto-Germanic*lausaz
19. English todaypantless

From pant + -less.