*qʰat-v-instrdoctor, treat an ailment the Indian wayDespite the fixed use of the prefix du- (normally indicating "with the fingers") the doctoring is primarily by sucking out the pain (normally taking the prefix si-).2.5.7Treat diseasePlural*qʰatad-*duqʰatpref.duqʰáʔvdoctor by sucking, treat an ailment the Indian waypl.*duqʰatadduqʰatá·du*siqʰatpref.siqʰáʔvdoctor, treat with waterpl.*siqʰatadsiqʰatádu