perspicuity (n.)

late 15c., perspicuite, of things, "clearness, transparency" (a sense now obsolete); 1540s of words or expressions, "quality of being clear to the mind; quality by which the meaning can be seen through the words," from Old French perspicuité and directly from Latin perspicuitas "transparency, clearness," from perspicuus "transparent," from perspicere "look through, look closely at" (see perspective).