testify

verb

1. (ambitransitive)To make a declaration, or give evidence, under oath.

   “It was only after a decade away from Skipton that I was finally able to garner the courage to return and testify against my abuser.”

   “One witness shall not testify against any person to cause him to die.”

2. (ambitransitive)To make a statement based on personal knowledge or faith.

   “We speak that we do know, and testify that we have seen; and ye receive not our witness.”

   “[T]he pleaſures of ſenſe have no reliſh vvhere thou [Jesus] irradiateſt and teſtifieſt vvith our conſcience, that vve are the children of God, and have done thy vvill ſincerely, […]”

3. (ambitransitive)To be evidence of.

   “"Iberian-Sardinian" substrate features have been posited time and time again. These have usually been explained as testifying to a migration from the Iberian Peninsula to Sardinia in prehistoric times.”