A derivational suffix forming agent nouns: auctour, avauntour, gilour, hasardour, malfesour, protectour, saviour, etc.; designations of persons having certain trades, professions, or offices: auctour, baneour, barbour, dictatour, doctour, jogelour, joinour, etc.; and nouns denoting instruments or utensils: chargeour, chaufour, gratour, labour, protectour, etc. The words containing this suffix are predominantly borrowings from OF, including AF: baratour, divinour, giour, herbergeour, lechour, limnour, minour, visitour, etc.; with a fair number from L or ML: dictour, inquisitour, instructour, interfectour, interpretator, etc.; and a smaller number of apparent ME formations on stems borrowed from OF or L: chastisour, gestour, grevour, inspirour, luminoure, etc. Words derived from OE or based on stems from OE usually take the suffix -er(e, but many of them show occasional substitution of -our; e.g. bender, berere, beter, graver(e, kervere; as do borrowings from OF (e.g. losenger) and ME formations on OF stems (e.g. gendrer).