irreligio

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

irrĕlĭgĭo (inr-), ōnis, f. [2. in-religio],

impiety , irreligion (post-class.), App. Trismeg. p. 91 (but not in Auct. Her. 2, 21).