Synonyms: unfailing, unflagging
Definition: unceasing
Usage: unfailing loyalty; unfailing good spirits; unflagging courtesy
Similar words: constant
Definition: steadfast in purpose or devotion or affection
Usage: a man constant in adherence to his ideals; a constant lover; constant as the northern star
Synonyms: unfailing
Definition: always able to supply more
Usage: an unfailing source of good stories; a subject of unfailing interest
Similar words: inexhaustible
Definition: incapable of being entirely consumed or used up
Usage: an inexhaustible supply of coal
Synonyms: unfailing, foolproof
Definition: not liable to failure
Usage: a foolproof identification system; the unfailing sign of an amateur; an unfailing test
Similar words: infallible
Definition: incapable of failure or error
Usage: an infallible antidote; an infallible memory; the Catholic Church considers the Pope infallible; no doctor is infallible