Third-person singular simple present indicative form of testify.(verb)
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Use "testifies" in a sentence
"CNN Political Ticker: All politics, all the time Blog Archive - Palin testifies in hacking case « - Blogs from CNN. com"
"This is a piece of unalloyed trash, a libel hatched by a low type of woman whose refusal to publish under her true name testifies to the evil of her intentions."
"Of these rare poetical pieces four are unnoticed by Lowndes; five of them are published anonymously; but their similarity to those with an author's name testifies the source from which the others emanated."