1 admitting of penetration or passage into or through; "a penetrable wall"; "penetrable defenses" [ant: impenetrable]
2 capable of being penetrated; "penetrable defenses"
- 1867: George Rawlinson, The Five Great Monarchies of the Ancient Eastern World
- :On the east the high mountain-chain of Zagros, penetrable only in one or two places, forms a barrier of the most marked character, and is beyond a doubt the natural limit for which we are looking.
- 1900: Arthur M. Mann, The Boer in Peace and War
- :A Boer may know you, but it will take you some time to know him, and when a certain stage in your acquaintance is reached, you may begin to wonder whether his real nature is penetrable at all.
- 1996: Peter Carruthers & Peter K. Smith, Theories of Theories of Mind
- :A capacity is cognitively penetrable in this sense if that capacity is affected by the subject's knowledge or ignorance of the domain.
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