(a) say
The word say, when used as a noun, means "an opinion or input in a matter".
E.g.
You have no say in this matter— No tienes ni voz ni voto en este asunto
Children have some say when it comes to buying a car— La opinión de los niños se tiene en cuenta a la hora de comprar un coche
You've had your say; now be quiet! — Has dado tu opinión; ahora cállate