acelerador
/aθeleɾaˈdoɾ/ · B2 · adj
accelerator
🚗 acelerador = accelerate + -dor (the one that does it), same as English accelerator
Spanish -dor marks a doer, like jugador (player) or trabajador (worker). Acelera- is the verb stem of acelerar (to speed up), so acelerador is the thing that speeds something up. The English word accelerator is a near twin.