Rún-wita

According to the Old English Dictionary:

an;

rún-wita

m. I. a privy councillor, one acquainted with a person's secrets :-- Deád is Æschere mín rúnwita and mín rǽdbora, Beo. Th. 2654; B. 1325. II. one acquainted with mysteries, a sage :-- Róf rúnwita (Guthlac), Exon. Th. 167, 30; Gú. 1068. run-wita