• synonyms


See more synonyms for relentless on Thesaurus.com
  1. that does not relent; unyieldingly severe, strict, or harsh; unrelenting: a relentless enemy.
Show More

Origin of relentless

First recorded in 1585–95; relent + -less
Related formsre·lent·less·ly, adverbre·lent·less·ness, noun

Synonyms for relentless

See more synonyms for on Thesaurus.com

Antonyms for relentless

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for relentless

Contemporary Examples of relentless

Historical Examples of relentless

British Dictionary definitions for relentless


  1. (of an enemy, hostile attitude, etc) implacable; inflexible; inexorable
  2. (of pace or intensity) sustained; unremitting
Show More
Derived Formsrelentlessly, adverbrelentlessness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for relentless


1590s, from relent + -less. Related: Relentlessly; relentlessness.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper