modify, change
El Gobierno tuvo que modificar su política exterior.
The government had to modify its foreign policy.
Tal vez deberíamos de modificar las medidas de seguridad.
Maybe we should change the security measures.
Ellos quieren modificar la ley.
They want to change the law.
Tendrás que modificar la altura de la mesa para que quepa.
You'll have to adjust the table's height so it fits.