Ou-sceacan

According to the Old English Dictionary:

ou-sceacan

I. to shake:--Heó feðera onsceóc. Cd. Th. 88, 26 ; Gen. 1471. Onscacene concusa, Wrt. Voc. ii. 15, 80. II. to shake off, remove:--Onscacan (-seacan. Wrt.) detestare, Wrt. Voc. ii. 106, 28. Onsceæcannæ onsceacnessum (ob-, MS.) excusandas excusationes, Ps. Spl. T. 140, 4. Cf. á-sceacan. ou-sceacan