unfailing

English edit

unfailing (comparative more unfailing, superlative most unfailing)

inexhaustible
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.
infallible