ἀναγκαιότης
From LSJ
θοἰμάτιον οὐκ ἀπολώλεκ', ἀλλὰ καταπεφρόντικα → I haven't lost my himation; I've pledged it to Thought | I have not lost my himation, but I've thought it away | I have not lost my himation, but I spent it in the schools
English (LSJ)
ητος, ἡ,
A blood-relationship, Lys.32.5 (pl.), Plb.18.51.10, D.H.2.10. II later, necessity, S.E.P.2.205.