Lewis & Short

infenso, āre, v. a. and n. [infensus], to treat in a hostile manner, to ravage, destroy (Tacitean).

  1. I. V. a.: bello Armeniam, Tac. A. 13, 37: pabula, id. ib. 6, 34.
  2. II. V. n., to act like an enemy, to be hostilely disposed: quasi infensantibus Dis, Tac. A. 13, 41.