sou
From Longman Dictionary of Contemporary Englishsousou /suː/ noun [singular] British English old-fashionedMONEY a very small amount of money He didn’t have a sou.Examples from the Corpussou• He is wonderfully avaricious, devious and a genius at avoiding parting with even a sou, all to great comic effect.• Sometimes he would throw away his francs to the soldiers and go home without a sou.• I can hear them telling the architect not to spare a single sou.