controlador
/kontɾolaˈdoɾ/ · B2 · adj
controller
🎮 control + -ador (one who does) = one who controls: controller, driver
Controlador comes from controlar (to control) plus the Spanish suffix -ador, meaning one who does the action. So it is the one who controls: a controller, a driver, or as an adjective, controlling. Same pattern as trabajador (worker).