nytennes

Old English edit

From nyten +‎ -nes.

nytennes f

ignorance (+genitive of something)
- c. 992, Ælfric, "The Nativity of St. Paul the Apostle"
  Æfter Cristes ðrowunge, ðaða se soða geleafa aspráng þurh ðæra apostola bodunge, ða ehte he cristenra manna þurh his nytennysse, and sette on cwearterne, and eac wæs on geðafunge æt ðæs forman cyðeres Stephanes slege: nis ðeah-hwæðere be him geræd, þæt hé handlinga ænigne man acwealde.
  After Christ's passion, when the true faith had sprung up through the preaching of the apostles, he persecuted christian men through his ignorance, and set them in prison, and was also consenting to the slaying of the first martyr Stephen: it is not, however, read of him that he killed any man with his own hands.

Declension of nytennes (strong ō-stem)