rearmost

From rear +‎ -most.

rearmost

1. Furthest to the rear.

   The rearmost member of the strike team walked backward to guard them from a surprise attack from behind.

   • 1912, Arthur Conan Doyle, The Lost World […], London; New York, N.Y.: Hodder and Stoughton, →OCLC:

     As I tramped along, the rearmost of the four, I could not help smiling at the appearance of my three companions in front.

• Rosmerta, rotamers