late 15c., a back-formation from maceration or else from Latin maceratus, past participle of macerare "soften, make soft, soak, steep," related to maceria "garden wall," originally "of kneaded clay," from PIE *mak-ero-, suffixed form of root *mag- "to knead" (cognates: Greek magis "kneaded mass, cake," mageus "one who kneads, baker;" Old Church Slavonic mazo "to anoint, smear;" Breton meza "to knead;" Middle Irish maistir "to churn"), also "to fashion, fit" (compare make, v.). Related: Macerated; macerating.