
Unfailing
Persistent Success
Describes someone or something that continually achieves desired outcomes without fail.
His unfailing efforts finally resulted in a well-deserved promotion.
Not Infallible
While 'unfailing' implies consistency, it doesn't mean incapable of error - context indicates limitation.
Her expertise seemed unfailing until the new technology proved challenging.
Beyond Skills
'Unfailing' often extends to describe character traits that contribute to reliability.
His unfailing honesty makes him a trustworthy leader.