rosoth a spurious word due to printers' errors for rother-soil: see rother 2. 1671Phillips s.v.Rother-beasts, Whence Ro-soil[1678–1706 Rosoth] is used in Herefordshire, for the soil..of those beasts.1708Kersey, Rother-soil or Rosoth.1721Bailey, Rother-soil, Rosoch.