Relentless meaning: Unrelenting

unrelenting : a relentless enemy. re•lent′less•ness, n. rigid, unbending, obdurate, adamant, unyielding. See inflexible. merciful. In Lists: Words ending in "less", New vocabulary, English Words, more... Synonyms: determined, persistent, persevering, dogged, tenacious, more... RELENTLESS definition: 1. continuing in a severe or extreme way: 2. continuing in a severe or extreme way: 3. continuing…. Learn more. Relentless definition: not easing or slackening ; maintaining speed, vigor, etc... See examples of RELENTLESS used in a sentence. The meaning of RELENTLESS is showing or promising no abatement of severity, intensity, strength, or pace : unrelenting . How to use relentless in a sentence.