ingredient (n.) Look up ingredient at
in early use also engredient, early 15c., "something forming part of a mixture," from Latin ingredientem (nominative ingrediens) "that which enters into" (a compound, recipe, etc.), present participle of ingredi "go in, enter," from in- "in" (see in- (2)) + gradi "to step, go" (see grade (n.)). Also from early 15c. as an adjective, "forming part of a mixture."