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testify

verbcommon in dialogue

  • //ˈtɛstɪfaɪ//

To make a declaration, or give evidence, under oath.

verb

  1. 1

    To make a declaration, or give evidence, under oath.

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

    Michael Jackson probably died after he rapidly injected himself with a dose of the surgical anesthetic propofol on top of a large dose of sedatives he swallowed when Dr. Conrad Murray was away, the defense’s propofol expert testified Friday.

    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.

  2. 2

    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. 3

    To be evidence of.

    Paradoxically, the sharp and unambiguous formulas in which Lenin called for the use of terror and denied the possibility of democracy and freedom testified to the fact that freedom had not yet been completely eradicated.

    "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.

Etymology

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.

Forms

past tense
testified
past participle
testified
present participle
testifying
third person singular
testifies
The neighbouring pagesAlphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.

Lexical content from Wiktionary, under CC BY-SA 4.0 · Source entry · Data version 2026-08-23

Rank among the words of the OpenSubtitles 2018 corpus — film and television subtitles, so spoken rather than written usage (CC BY-SA 3.0).