rixo
Could not find rixentur in Logeion dictionaries.
rixentur Verb: present passive subjunctive 3rd plural of rixo
rixo, āre, v. rixor fin.
rīxo, āre = rixor, Varro sat. Men. 43 u. 454. Porphyr. Hor. carm. 3, 21, 2 u. Eccl. (s. Rönsch Itala p. 299).
rixō, āre, intr., c. rixor : Varro Men. 43 ; 454.