po ‧ rous /ˈpɔːrəs/ BrE AmE adjective
[ Date: 1300-1400 ; Language: French ; Origin: poreux , from pore ; ⇨ ↑ pore 1 ]
1 . allowing liquid, air etc to pass slowly through many very small holes:
porous material
2 . easy to pass through or get into something:
the porous border between Haiti and the Dominican Republic