Lewis Short
lucta (noun F) : root lug-; cf. λυγίζω, to writhe, ligare
* A wrestling, wrestling-match (post-class.): exercebat cum militibus ipse luctam,Capitol. Maxim. 6: certamen luctae,Aus. Ep. 93.
* Trop.: perseverans quodammodo lucta convincitur,Aug. Ep. 606.
Charlton T. Lewis, Charles Short, A Latin Dictionary