Skip to the word

Added 9 October 2026

testify

/ˈtɛstɪfaɪ/ verb

In Latin: testificor Wiktionary

verb Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about testify at Wordnik → Where our words come from →

To make a declaration, or give evidence, under oath.
To make a statement based on personal knowledge or faith.
To be evidence of.

Origin

PIE word *tréyes From Middle English testifien, borrowed from Old French testifier, from Latin testificārī (“to bear witness”), from testis (“a witness”) + facere (“to make”). See -fy.

From Wiktionary, via Kaikki.org (CC BY-SA)

Back to today's word