sessionsession

Session comes from Old French session ‘sitting’, from Latin sessiō ‘a sitting’, from sedeō ‘to sit’, ultimately from Proto-Indo-European *sed- ‘to sit’.

1. Proto-Indo-Europeanc. 4500–2500 BCE*sed-¹‘to sit’reconstructed
2. Proto-Indo-Europeanc. 4500–2500 BCE*sed-éh₁-ye-ti¹reconstructed
3. Proto-Italicc. 1500–700 BCE*sedēō¹‘to sit’reconstructed
4. Latinc. 75 BCE–200 CEsedeō²‘sit’
5. Latinc. 75 BCE–200 CEsessiō²‘a sitting’
6. Old Frenchc. 842–1400session²‘sitting’
7. Middle Englishc. 1150–1500session²
8. Englishearliest quotation 1859session²

1. ¹ Wiktionary, Latin sedeo
2. ² Wiktionary, English session
3. Earliest quotation in Wiktionary’s entry: 1859, Alfred Tennyson, Vivien: “But Vivien, gathering somewhat of his mood, / And…”.