Ge-sĕþness

According to the Old English Dictionary:

e ;

ge-sĕþness

f. Assertion, affirmation :-- Þæt hé geseah hé gesóðode þurh his geséðnysse, þeáh þe hý sume noldon his láre underfón ne his geséðnysse, Nap. 32. ge-seþness