Main entry: unfailing, unflagging
Definition: unceasing
Usage: unfailing loyalty; unfailing good spirits; unflagging courtesy
Main entry: unfailing
Definition: always able to supply more
Usage: an unfailing source of good stories; a subject of unfailing interest
Main entry: unfailing, foolproof
Definition: not liable to failure
Usage: a foolproof identification system; the unfailing sign of an amateur; an unfailing test