penetrability n the quality of being penetrable (by people or light or missiles etc.) Usage(s) All life, according to Lawsonomy, operates according to the laws of "maneuverability, penetrability, and zigzag-and-swirl. This penetrability is a legacy of computers designed for ease of use and accessibility to the Internet (itself a Pentagon creation). Synonym(s) perviousness Antonym(s) impenetrability imperviousness