avoirdupois
n. UK //ɐvwˈɑːdjuːpwˌɑː// av·oir·du·pois
From Middle English avoir de pois, aver de peis, haburdy poyse, haburdepays, haburdepeyse, from Old French aveir + de + peis (“asset of weight”), influenced by Middle French avoir + du + pois; compare French poids (“weight”).