indefectus

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

in-dēfectus, a, um, adj.,

undiminished , unfailing , unweakened , unexhausted (post-class.): (with aeterna) vivacitas, Ap. Deo Socr. p. 44, 6: (with jejunus) chamaeleon, Tert. Pall. 3.