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ensure

verbcommon in dialogue

  • United States//ɪnˈʃʊɹ//
  • United States//ɪnˈʃɝ//
  • //ɪnˈʃɔː(ɹ)//
  • //ɪnˈʃʊə(ɹ)//

To make sure or certain of something (usually some future event or condition).

verb

  1. 1

    To make sure or certain of something (usually some future event or condition).

    I use an alarm clock to ensure that I get up on time.

    British journalists shun complete respectability, feeling a duty to be ready to savage the mighty, or rummage through their bins. Elsewhere in Europe, government contracts and subsidies ensure that press barons will only defy the mighty so far.

  2. 2

    obsoleteTo make a pledge to (someone); to promise, guarantee (someone of something); to assure.

    Thenne he cryed hym mercy and sayd Faire knyght for goddes loue slee me not / and I shall ensure the neuer werre ageynst thy lady / but be alwey toward her / Thenne Bors lete hym be

Etymology

From Middle English ensuren, from Anglo-Norman enseurer, from Old French seur (“sure”). Doublet of insure.

Forms

past tense
ensured
past participle
ensured
present participle
ensuring
third person singular
ensures
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).