' scabies , mange ', a pre-Romance word glossed by Latin authors. There're also Basque sarra 'rust, iron tartar' 1 and Spanish sarro 'tartar, plaque', with assimilation -rn- > -rr- . The source of this and other loanwords is an IE substrate language called Italoid by the Indo-Europeanist Francisco Villar 2  and Sorotaptic