Porous (adjective)

1. Allowing liquids or gases to pass through easily.
2. Having many small holes or pores that allow liquids or gases to pass through.

Origin:

From latin porous, from porus ("a passage, hol.e")

Examples:

1. The soil was so porous that the water drained away quickly.
2. The filter was made of porous material that allowed air to pass through.
3. Porous rocks are easily eroded by water.
4. The membrane was designed to be highly porous to allow gas exchange.
5. The new material was much more porous than the old one and allowed more air to circulate.