belligeror
Could not find belligerauerant in Logeion dictionaries.
belligerauerant Verb: pluperfect active indicative 3rd plural of belligeror
belligĕror, āri, v. belligero init.
bellĭgĕror, ātus sum, ārī, dép., Hyg. Fab. 274 ; c. belligero.