Yours, Etc.: Origins and Uses of 8 Sign-Offs
late 14c. (implied mid-13c. in surname Furbisher), from Old French forbiss-, present participle stem of forbir "to polish, burnish; mend, repair" (12c., Modern French fourbir), from a Germanic source (cf. Old High German furban "to polish"), from PIE root *prep- "to appear." Related: Furbished; furbishing.