Third-person singular simple present indicative form of testify.(verb)
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Use "testifieth" in a sentence
"Mary's mother, Margaret Bliss, "testifieth that Sarah Bridgman told her that she did hear that her daughter Parsons was suspected to be a witch.""
"Jesus Christ is risen from the dead, were true martyrs; for a martyr is, to give the true definition of the word, a witness of the resurrection of Jesus the Messiah; which none can be but those that those that conversed with him on earth, and saw him after he was risen: for a witness must have seen what he testifieth, or else his testimony is not good."
"Panurge was all the more adread, as Aristotle testifieth that men"