Lewis & Short

injustĭtĭa, ae, f. [injustus].

  1. I. Injustice, unjust proceeding: injustitiae duo genera sunt, etc., Cic. Off. 1, 7, 23: totius injustitiae nulla capitalior est, quam eorum, etc., id. ib. 13, 41; id. N. D. 3, 28 fin.; id. Tusc. 4, 18, 42.
    Plur.: exprobrante illis peccata et injustitias, Lact. 4, 16, 12.
  2. II. Severity, harsh proceeding: eum ego hinc ejeci injustitiā meā, Ter. Heaut. 1, 1, 82.