Unerring/ʌnˈɜːrɪŋ/ Definition 1 of 1Pro Tip 1/3Always Perfect Use 'unerring' when something or someone is reliably perfect or right every time. The detective had an unerring knack for solving mysteries. Pro Tip 2/3Not Human 'Unerring' is rarely used to describe people, as it suggests a level of perfection beyond human ability. The machine operated with unerring precision. Pro Tip 3/3Confidence Implied Using 'unerring' implies that there's a strong confidence in something's accuracy or performance. He made the decision with unerring confidence.