How do you spell Pervious

Available Definitions:
1)  a. - Admitting passage; capable of being penetrated by another body or substance; permeable; as, a pervious soil.
2)  a. - Capable of being penetrated, or seen through, by physical or mental vision.
3)  a. - Capable of penetrating or pervading.
4)  a. - Open; -- used synonymously with perforate, as applied to the nostrils or birds.