The quality of being simple or uncompounded. Synonym:simplicity.
3.
Freedom from difficulty or hardship or effort. Synonyms:ease, easiness, simplicity."They put it into containers for ease of transportation" , "The very easiness of the deed held her back"
... I would there were some one that I could aid, Though lacking the simpleness, lacking the worth, Yet wanted and trusted by right of birth, Some townfellow stripling, ... — Ionica • William Cory (AKA William Johnson)