Lewis & Short

com-pugno, āre, v. n.

  1. I. To fight or contend together (post-class.), Gell. 12, 5, 3; 14, 5, 4; 14, 5 fin.; Sulp. Sev. de Vita S. Mart. 14.
  2. II. To combat together: amaritudinem, Veg. Art. Vet. 1, 13, 6.