indiscussibilis

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

in-discussĭbĭlis, e, adj. [2. in-discutio],

that is not to be discussed (late Lat.): auctoritas (al. discussibilis), Claud. Mam. Stat. Anim. 2, 12; 3, 11.