unfailing

English

Etymology

From un- +‎ failing.

Adjective

unfailing (comparative more unfailing, superlative most unfailing)

1. inexhaustible
2. changeless, constant
   • 1894, Harper's New Monthly Magazine, volume 89, number 534, page 787:

     There is an unfailing charm about his novels, an unwearing freshness.

   • 2021 June 30, Tim Dunn, “How we made... Secrets of the London Underground”, in RAIL, number 934, page 51:

     It is a work of love, made in difficult times at complex locations, with the unfailing support of dozens of brilliant professional people.

3. infallible