(a.) Capable of being entered or pierced\.

accessible apprehensible approachable articulate assailable attackable attainable available beatable cognizable come-at-able comprehensible conquerable easily understood easy to understand exoteric expugnable fathomable findable getatable gettable intelligible knowable obtainable open open to openable permeable pervious plumbable porose porous pregnable prehensible procurable reachable readable scrutable securable surmountable to be had understandable vincible vulnerable weak within reach