Bi-scencan

According to the Old English Dictionary:

bi-scencan

p. -scencte, pl. -scencton; pp. -scenced [scencan to give drink, scenc drink] To give to drink; ad potionem dare :-- Ge in wræcsíðe longe lifdon, lége biscencte ye [fallen spirits] have long lived in exile, flame being given [you] to drink, Exon. 41 b; Th. 139, 21; Gú. 596. bi-scencan