confirmar

Confirmar is a verb in Spanish and Portuguese meaning to verify, affirm, or establish the truth or validity of something. The term derives from Latin confirmare, formed from con- “together” and firmare “to make firm,” reflecting the sense of making a statement or fact solid.

In Spanish, confirmar is a regular -ar verb and is used to indicate the act of validating facts, arrangements, beliefs, or documents. Common contexts include confirming a reservation, confirming an appointment, or confirming a hypothesis. Its present indicative forms are confirmed as follows: yo confirmo, tú confirmas, él/ella confirma, nosotros confirmamos, vosotros confirmáis, ellos confirman. The verb also appears in subjunctive and imperative moods, used to express doubt, necessity, or commands, for example, "indica que confirme" or "confirma la reserva." The noun form is confirmación, meaning confirmation.

In Portuguese, confirmar is likewise a regular -ar verb and shares similar meanings: to verify or to affirm something as true or accepted. Present indicative forms in Brazilian Portuguese typically include eu confirmo, você/ele/ela confirma, nós confirmamos, vocês confirmam, with tu forms used in some dialects as confirmas and ele/ela confirma. As in Spanish, the verb appears in subjunctive and conditional tenses to express doubt, insistence, or politeness in requests, such as "que eu confirme" or "se você confirmar."

Beyond everyday usage, confirmar is common in administrative, legal, and technical contexts, where it denotes formal validation or approval. The related noun forms are confirmación in Spanish and confirmação (or confirmação) in Portuguese.