Lewis & Short

lucta, ae, f. [root lug-; cf. λυγίζω, to writhe, ligare],

  1. I. a wrestling, wrestling-match (post-class.): exercebat cum militibus ipse luctam, Capitol. Maxim. 6: certamen luctae, Aus. Ep. 93.
  2. II. Trop.: perseverans quodammodo lucta convincitur, Aug. Ep. 606.