abjurar

To abjure — formally and often publicly renounce a belief, faith, or allegiance, historically under pressure or oath. It carries real historical and religious weight, distinct from an everyday change of mind.

• Fue obligado a abjurar de su fe ante el tribunal. — He was forced to abjure his faith before the tribunal.
• El científico se negó a abjurar de sus descubrimientos. — The scientist refused to renounce his discoveries.
• Abjuró públicamente de sus antiguas ideas políticas. — He publicly renounced his former political views.

Don't reach for abjurar for an everyday change of opinion — it implies a solemn, often coerced, public renunciation, usually of a faith or deeply held belief, not simply reconsidering a stance.

• quote "Abjuro, maldigo y detesto los errores y herejías..." — The opening words of Galileo Galilei's forced abjuration before the Roman Inquisition on June 22, 1633, recanting his support for heliocentrism.