gecyþan

Old English

From ġe- +‎ cȳþan.

ġecȳþan

to report, to make known
to announce, declare
to reveal, manifest, show
to testify
to prove
- late 9th century, translation of Orosius’ History Against the Pagans
  On þām ġewinne, ⁊ on moneġum oþrum æfter þǣm, Hannibal ġecȳþde þone nīþ ⁊ þone hete þe hē beforan his fæder ġeswōr, þā hē nigonwintre cniht wæs, þæt hē næfre ne wurde Rōmana frēond.
  In that battle, and in many others after that, Hannibal proved the hatred and hostility that he swore before his father when he was a nine-year-old boy, that he would never become a friend of the Romans.

Conjugation of ġecȳþan (weak class 1)