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: not easing or slackening ; maintaining speed, vigor, etc... See examples of RELENTLESS used in a sentence. RELENTLESS definition: never stopping or getting any less extreme: . Learn more. RELENTLESS definition: 1. continuing in a severe or extreme way: 2. continuing in a severe or extreme way: 3. continuing…. Learn more.
