vilepana (Pali) comes from Pali lepana, from Pali āṇā, from Sanskrit आज्ञा, from Sanskrit ज्ञा, from Proto-Indo-Aryan ȷ́naH-, from Proto-Indo-Iranian ǰnaH-, from Proto-Indo-European ǵneh₃- — to know.
vilepana (Pali): ointment