naumăchĭārĭus — Lewis & Short
naumăchĭārĭus, a, um, adj.naumachia,
I of or for a mock sea-fight:
pons,Plin. 16, 39, 74, § 190.—Hence,
II Subst.: nau-măchĭārĭus, ii, m., a combatant in a mock sea-fight, Suet. Claud. 21.