trencher

noun3

1. •
   Someone who trenches; especially, one who cuts or digs ditches.
2. •
   A machine for digging trenches.

   • The milling action of the bucket line enables the trencher to cut through difficult materials, such as stone rubble and brick filling, and to leave a good trench with clean side walls. — 1956
3. •
   (no longer used, historical) A plate on which food is served or cut.

   • Mrs Partridge, upon this, immediately fell into a fury, and discharged the trencher on which she was eating, at the head of poor Jenny […] — 1749