On-unwísdóm

According to the Old English Dictionary:

on-unwísdóm

Probably this word should be rejected, for the passage in which it occurs seems corrupt :-- Ic wæs wiþerméde and unwísum nétenum gelíc geworden. Ac þu Drihten scyld mínre iugoþe and mín onunwísdómes ne wes þú gemyndig (= ? Þu, Drihten, forgif þá scylde mínre iugoþe, and mínes unwísdómes ne wes þú gemyndig), Bl. H. 89, 10. See, however, preceding word. on-unwisdom