Astíðian

According to the Old English Dictionary:

astíðian

p. ode, ude; pp. od, ud [a intensive, stíðian to become hard] To become hard, dry, dry up, wither; indurare, arescere :-- Astíðude swá swá tigle miht mín my strength dried up as a tile, Ps. Spl. 21, 14. Hit astiðaþ and drugaþ induret et arescat, 89, 6. a-stiðian,astiðian