incorruptible (adj.)

mid-14c., in a physical sense, from Old French incorruptible (14c.), or directly from Late Latin incorruptibilis "incorruptible," from Latin incorruptus "unspoiled, unseduced," from in- "not" (see in- (1)) + corruptus (see corrupt (adj.)). From 1660s in English in a moral sense. Related: Incorruptibly.