despavorir

A defective, archaic verb meaning to become terrified — it survives today almost only in its past participle despavorido/a (terrified, panic-stricken), which has become a fully independent adjective. As a conjugated verb, despavorir is rare to the point of being mostly a grammar curiosity, since it's traditionally restricted to forms whose ending starts with i-, like abolir.

• Salió despavorido de la casa en llamas. — He ran out of the burning house in a panic.
• La vio despavorida al escuchar el disparo. — He saw her terrified at the sound of the gunshot.
• Los animales huyeron despavoridos por el incendio. — The animals fled in terror because of the fire.

Trying to conjugate despavorir in ordinary forms like despavoro or despavorí — in practice almost nobody uses anything but the adjective despavorido/a; aterrorizarse or asustarse are what you'd actually use to describe the process of becoming terrified.