demostré

Demostró is the third-person singular form of the Spanish verb demostrar in the pretérito perfecto simple (preterite) indicative. It translates as “he demonstrated,” “she demonstrated,” or, in formal address, “you demonstrated.” The form is used to describe a completed action in the past in which an argument, proof, or demonstration was provided.

Etymology and meaning: demostrar comes from Latin demonstrare, meaning “to show, point out.” The Spanish verb preserves the root demostr- with the standard -ó ending for the pretérito of él/ella/usted. The accent on the final syllable helps indicate the correct stress in this verb form.

Usage notes: Demostró is widely used across domains such as science, law, journalism, and everyday speech. It often introduces a subordinate clause with que: “Demostró que la hipótesis es válida.” In mathematical or formal contexts, the passive or impersonal construction “se demostró” is common to express that a result was proven: “Se demostró que la proposición es verdadera.”

Related forms: Other conjugations include demuestra (present), demostraste (tú pretérito), demostró (él/ella/usted), demostramos (nosotros), demostrasteis (vosotros), demostraron (ellos/ellas/ustedes). The infinitive is demostrar, and the past participle is demostrado. Common related noun is demostración.

Cognates and equivalents: In Portuguese, demonstrou; in French, a démontré; in Italian, dimostrò. In English, the equivalent verb is demonstrated or proved, depending on context.