Full of pores; having interstices in the skin or in the substance of the body; having spiracles or passages for fluids; permeable by liquids; as, a porous skin; porous wood.
source: Webster 1913
adjective satellite
able to absorb fluids
The partly porous walls of our digestive system. Compacting the soil to make it less porous.
source: WordNet 3.0
allowing passage in and out
Our unfenced and largely unpoliced border inevitably has been very porous.