verb

confirmer

confirm

Dire clairement que quelque chose est vrai, juste ou certain.

Definition & meaning

Confirmer means to confirm: to establish that something is true, correct, or certain.

  • Les résultats confirment son hypothèse. — The results confirm his hypothesis.

It can also mean to confirm an arrangement or decision, or to strengthen someone in a belief or position.

  • Je confirme ma réservation. — I confirm my reservation.
  • Cette expérience l’a confirmé dans son choix. — This experience strengthened him in his choice.

In a religious context, it can mean to confirm someone through the Christian rite of confirmation.

Grammar & Word origin

Confirmer is a regular -er verb, usually followed by a direct object. Its past participle is confirmé.

It comes from Latin confirmare, meaning “to strengthen” or “to establish firmly,” formed from con- and firmare (“to make firm”).

Synonyms & antonyms

  • attester — to attest to or certify; often emphasizes evidence or testimony.
  • valider — to validate or approve; emphasizes official acceptance.
  • renforcer — to strengthen; close to confirmer when a belief or position becomes stronger.
  • infirmer — to disprove or refute; the opposite when a claim is shown to be false.
  • annuler — to cancel; the opposite when an arrangement is called off rather than confirmed.

Common phrases & collocations

  • confirmer une réservation — to confirm a booking.
  • confirmer une hypothèse — to confirm a hypothesis.
  • confirmer quelqu’un dans son choix — to reassure someone that their choice was right.

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Examples

Tu dois confirmer ton choix.verb

You must confirm your choice.

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