porous
adjective /ˈpɔːrəs/
  /ˈpɔːrəs/
- having many small holes that allow water or air to pass through slowly
- porous material/rocks/surfaces
 - He added sand to the soil to make it more porous.
 
Oxford Collocations DictionaryPorous is used with these nouns:- border
 - rock
 
Word Originlate Middle English: from Old French poreux, based on Latin porus ‘pore’.