Allowing fluids or gases to pass or diffuse through.

Roget 260: open; perforated etc. v.; perforate; wide open, ajar, unclosed, unstopped; oscitant^†, gaping, yawning; patent.    tubular, cannular^†, fistulous; pervious, permeable; foraminous^†; vesicular, vasicular^†; porous, follicular, cribriform^†, honeycombed, infundibular^†, riddled; tubulous^†, tubulated^†; piped, tubate^†.    opening etc. v.; aperient^†.    ... show more

Dutch: doordringbaar, permeabel
Polish: przepuszczalny