The story
- Proto-Indo-European*ḱe?
- Proto-Indo-European*ḱóm
- Proto-Indo-European*ḱm̥-th₂der.?
- Proto-Hellenic*kətá
- Ancient Greekκατά (katá)
- Proto-Indo-European*sed-
- Proto-Indo-European*sedreh₂
- Proto-Hellenic*hédrā
- Ancient Greekἕδρα (hédra)
- Ancient Greekκᾰθέδρᾱ (kăthédrā)
- Latincathedra
- Old Frenchchaiere
- Middle Englishchayere
- Englishchair
- Proto-Indo-European*bʰer-
- Proto-Indo-European*bʰéreti
- Proto-Germanic*beraną
- Proto-West Germanic*beran
- Old Englishberan
- Old English(ġe)boren
- Middle Englishboren /iborne
- Englishborne
- English todaychairborne
From chair + borne, perhaps a pun on airborne, in reference to those in the military who do not fly aircraft.
Etymology from Wiktionary, CC BY-SA 4.0.