Un-bletsung

According to the Old English Dictionary:

e;

un-bletsung

f. Cursing :-- Fela is ðæra ðe .... embe bletsunga oððe unbletsunga leohtlíce lǽtaþ, and ná understandaþ ... 'Quodcumque benedixeritis et cetera,' L. I. P. 6; Th. ii. 310, 36. un-bletsung