mid-15c., "a pickling fluid, seasoning, sauce, something used to give relish to food," from Old French condiment (13c.), from Latin condimentum "spice, seasoning, sauce," from condire "to preserve, pickle, season, put fruit in vinegar, wine, spices, etc.," a variant of condere "put together, store," from assimilated form of com "together" (see con-) + -dere "put," from PIE root *dhe- "to put, place."
Related: Condimental. Middle English also had a verb condite (early 15c.) "to season, prepare or preserve with salt, spices, sugar, etc."