permeable

permeable

CEFR: C1-C2 /per-me-able/ [p.er1.m.iy2.ah0.b.ah0.l]

If a substance is permeable, something such as water or gas can pass through it or soak into it. For example:

Example Sentences:
A number of products have been developed which are permeable to air and water.
An aquifer is an underground layer of water-bearing rock. Water-bearing rocks are permeable and porous, meaning that they have openings that liquids and gases can pass through.