arrobar

A literary verb meaning to enrapture, entrance, or send into ecstasy — used almost exclusively in its reflexive form, arrobarse, for someone lost in wonder or admiration. It comes from the old Spanish robar (to seize/carry off), not from arroba (the weight unit or the @ symbol), though an obsolete sense of arrobar did mean "to weigh in arrobas."

• Se arrobó contemplando el amanecer. — She was entranced watching the sunrise.
• El público se arrobó con la interpretación de la pianista. — The audience was enraptured by the pianist's performance.
• Se quedó arrobado frente al cuadro durante minutos. — He stood entranced in front of the painting for minutes.

Assuming arrobar is related to arroba (the @ symbol) — despite the shared root spelling, the everyday word for "to enrapture" and the weight/symbol arroba come from different senses of the same old word family, and modern speakers don't associate the two.