relentless
adj/ɹɪˈlɛntləs/
Etymology From relent + -less.
1
Unrelenting or unyielding in severity.
- She sniffed, too, comprehendingly, and fixed her son with a relentless eye.1930, Norman Lindsay, Redheap, Sydney, N.S.W.: Ure Smith, →OCLC, page 111:
2
Steady and persistent; unremitting.
- In Clintonworld, the reaction to Grassley’s relentless assault on Huma is one of resignation.2016 January 31, “Is Huma Abedin Hillary Clinton’s Secret Weapon or Her Next Big Problem?”, in Vanity Fair, retrieved 21 Jan 2016:
- Synonyms
- bateless, grim, incontestable, inexorable, invincible, irresistible, overpowering, overwhelming, potent, puissant, persistent, relentless, unrelenting, unremitting, unstoppable, unyielding
- Antonyms
- contestable, exorable, impotent, relenting, remitting, stoppable, underwhelming, vincible, yielding
- Derived terms
- relentlessly, relentlessness, unrelentless
- Related terms
- indomitable, inevitable, tireless