Porous

Sponges are porous.

The countries have competing claims to villages and towns along the porous, undefined border.

Her hair is rather porous.

The Colorado silver lodes are porous at the surface and colored more or less red or green.

Government tests show that much of the water here is contaminated by leaking septic tanks or farm chemicals that have seeped into the porous soil.

White glue can be used on any smooth, porous surface.

Sponges are porous so they can filter water while trapping food.

Concrete is porous, so water will slowly filter through it.

However, Wolves ^([sic]) porous defence opened up again to gift Sunderland a foothold in the game - Sessegnon sweeping in a Zenden corner that was inexplicably allowed to bounce in the six-yard box.

[…] a porous border consequently positioned migrants from Mexico and ethnic Mexicans residing in the United States as potential terrorists.