Vincent's NT Word Studies
20. Is (ginetai). More literally, arises or originates.Private (idiav). See on ver. 3. His own. Rev., special, in margin. Interpretation (epilusewv). Only here in New Testament. Compare the cognate verb expounded (Mark iv. 34) and determined (Acts xix. 39). The usual word is eJrmhneia (1 Cor. xii. 10; xiv. 26). Literally, it means loosening, untying, as of hard knots of scripture.