porous

of something that has many small holes, so liquid or air can pass through, especially slowly; to be not effective in preventing people from attacking or escaping. พรุน,มีรูมาก,แทรกผ่านหรือซึมได้.

The region’s geography and porous borders made it difficult to effectively police all of the drug routes, the police general said.

Many of the drugs have side effects that can limit their usefulness in many people whose bones have become overly porous and fragile.

Rice University researchers have developed yet another li-ion (lithium-ion) silicon battery anode, but this time it is a crushed, porous silicon anode.