- porous - able to absorb fluids; "the partly porous walls of our digestive system"; "compacting the soil to make it less porous"
Antonym: impermeable (indirect, via permeable)
- porous, poriferous - full of pores or vessels or holes
Antonym: nonporous
- holey, porous - allowing passage in and out; "our unfenced and largely unpoliced border inevitably has been very porous"
Antonym: tight (indirect, via leaky)