unfailing

A calculous concretion found in the intestines of certain ruminant animals (as the wild goat, the gazelle, and the Peruvian llama) formerly regarded as an unfailing antidote for poison, and a certain remedy for eruptive, pestilential, or putrid diseases

unfailingly; unerringly.

infallible or unfailing s

the quality of being steady and unfailing

destined or inevitable s physically secure or dependable s reliable in operation or effect s (of persons) worthy of trust or confidence s infallible or unfailing s certain not to fail s impossible to doubt or dispute