Lettan

According to the Old English Dictionary:

lettan

Add: (1) to hinder a person, thing, action, &c. :-- Ne leteð non tricaverit (si lethi somnus palpebrarum convolatus nan tricaverit, Ald. 80, 20), Wrt. Voc. ii. 88, 36. Let, An. Ox. 8b, 6. (2) the action from which one is hindered given in genitive :-- Wé þé þæs nú nellað lettan þæs þú ǽr geþóht hæfdest propositi tui ortnonomias dirumpere nolumus, Guth. Gr. 123, 20. lettan