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relentless - 20 thesaurus results
| Main Entry: | relentless |
| Part of Speech: | adjective |
| Definition: | cruel, merciless |
| Synonyms: | adamant, bound, bound and determined, determined, dogged, ferocious, fierce, grim, hard, harsh, implacable, inexorable, inflexible, inhuman, mortal, obdurate, pitiless, remorseless, rigid, rigorous, ruthless, single-minded, stiff, strict, stringent, unbending, uncompromising, unflinching, unforgiving, unrelenting, unyielding, vindictive, dead set on, go for broke, hang in, hang-tough, stop at nothing, unappeasable, undeviating, unstoppable |
| Antonyms: | kind, merciful, sympathetic, understanding |
| Main Entry: | relentless |
| Part of Speech: | adjective |
| Definition: | continuous, neverending |
| Synonyms: | incessant, nonstop, persistent, pertinacious, punishing, sustained, tenacious, unbroken, unfaltering, unflagging, unrelenting, unabated, unrelieved, unremitting, unstoppable |
| Antonyms: | ending, intermittent, stopping |
| Main Entry: | cold-blooded |
| Part of Speech: | adjective |
| Definition: | cruel, heartless |
| Synonyms: | barbarous, brutal, callous, cold, dispassionate, hard-boiled, hardened, imperturbable, inhuman, matter-of-fact, merciless, obdurate, pitiless, relentless, ruthless, savage, unemotional, unfeeling, unmoved, hard-hearted, steely, stony-hearted, uncompassionate |
| Notes: | cold-blooded (poikilothermic, poikilothermal) is used for creatures whose blood takes on the temperature of their environment; warm-blooded (homoiothermic, homeothermal) is having a fairly steady body temperature governed by the thermotaxic nerve mechanism |
| Antonyms: | compassionate, demonstrative, feeling, friendly, merciful, nice, sympathetic, warm-blooded |
| Main Entry: | continual |
| Part of Speech: | adjective |
| Definition: | constant, incessant |
| Synonyms: | ceaseless, connected, consecutive, continuous, endless, enduring, eternal, everlasting, frequent, interminable, permanent, perpetual, persistent, recurrent, regular, relentless, repeated, repetitive, running, steady, timeless, unbroken, unceasing, unchanging, unending, unfailing, unflagging, uninterrupted, unvarying, aeonian, around-the-clock, dateless, oft-repeated, persisting, staying, unremitting, unwaning |
| Antonyms: | broken, halting, inconstant, infrequent, intermittent, interrupted, occasional, temporary, ceasing, checked |
| Main Entry: | cruel |
| Part of Speech: | adjective |
| Definition: | vicious, pitiless; causing pain |
| Synonyms: | atrocious, barbarous, bestial, bitter, bloodthirsty, brutal, callous, cold-blooded, degenerate, depraved, evil, excruciating, ferocious, fierce, flinty, hard, harsh, hateful, heartless, hellish, implacable, inexorable, inhuman, malevolent, merciless, monstrous, painful, pernicious, poignant, relentless, revengeful, ruthless, sadistic, sinful, spiteful, tyrannical, unfeeling, unkind, unnatural, unrelenting, vengeful, vicious, virulent, wicked, brutish, demoniac, hard-hearted, inhumane, rancorous |
| Antonyms: | charitable, compassionate, considerate, feeling, gentle, kind, merciful, sympathetic, thoughtful, uncruel |
| Main Entry: | cutthroat |
| Part of Speech: | adjective |
| Definition: | ruthless |
| Synonyms: | barbarous, bloodthirsty, cruel, dog-eat-dog*, ferocious, merciless, pitiless, relentless, savage, unprincipled, vicious, hard as nails |
* = informal/non-formal usage
| Main Entry: | dogged |
| Part of Speech: | adjective |
| Definition: | determined, persistent |
| Synonyms: | adamant, bullheaded*, firm, hard-nosed, hardheaded*, indefatigable, inexorable, inflexible, insistent, mulish, obdurate, obstinate, persevering, pertinacious, pigheaded*, relentless, resolute, rigid, single-minded, staunch, steadfast, steady, stubborn, tenacious, unbending, unflagging, unshakable, unyielding, hanging tough, perseverant, perseverative, tough nut |
| Antonyms: | indifferent, irresolute, undetermined, yielding |
* = informal/non-formal usage
| Main Entry: | eternal |
| Part of Speech: | adjective |
| Definition: | without pause; endless |
| Synonyms: | abiding, ageless, always, boundless, ceaseless, constant, continual, continuous, deathless, enduring, everlasting, forever, immemorial, immortal, immutable, imperishable, incessant, indefinite, indestructible, infinite, interminable, lasting, never-ending, perennial, permanent, perpetual, persistent, relentless, timeless, unbroken, unceasing, undying, unending, uninterrupted, amaranthine, continued, dateless, illimitable, perdurable, termless, unfading, unremitting, without end |
| Antonyms: | brief, changeable, changing, ending, ephemeral, stopping, temporary, transient, terminable |
| Main Entry: | ferocious |
| Part of Speech: | adjective |
| Definition: | violent, barbaric |
| Synonyms: | barbarous, bloodthirsty, brutal, cruel, fell, feral, fierce, frightful, grim, implacable, inhuman, lupine, merciless, murderous, pitiless, predatory, rapacious, ravenous, relentless, ruthless, savage, truculent, unmerciful, unrestrained, untamed, vehement, vicious, voracious, wild, brutish, inhumane, ravening, sanguinary, tigerish, wolfish |
| Antonyms: | gentle, innocent, kind, mild, nonviolent, tame, tender |
| Main Entry: | fierce |
| Part of Speech: | adjective |
| Definition: | violent, menacing |
| Synonyms: | angry, animal, ape, awful, barbarous, bloodthirsty, blustery, boisterous, bold, brutal, cruel, cutthroat*, dangerous, enraged, fell, feral, ferocious, fiery, frightening, furious, horrible, impetuous, infuriated, intense, malevolent, malign, murderous, passionate, powerful, primitive, raging, raving, relentless, savage, stormy, strong, tempestuous, terrible, threatening, truculent, tumultous/tumultuous, uncontrollable, untamed, vehement, venomous, vicious, wild, brutish, flipped, howling, tigerish |
| Antonyms: | calm, gentle, kind, meek, nonviolent, peaceful, tame, tender, unthreatening |
* = informal/non-formal usage
| Main Entry: | grim |
| Part of Speech: | adjective |
| Definition: | hopeless, horrible in manner, appearance |
| Synonyms: | austere, barbarous, bleak, cantankerous, churlish, cruel, crusty, dogged, ferocious, fierce, forbidding, foreboding, formidable, frightful, funereal, ghastly, gloomy, glum, grisly, grouchy, gruesome, grumpy*, harsh, hideous, implacable, inexorable, intractable, merciless, morose, ominous, relentless, resolute, ruthless, severe, shocking, sinister, somber, sour, stern, stubborn, sulky, sullen, surly, terrible, truculent, unrelenting, unyielding, crabbed, glowering, horrid, scowling, splenetic |
| Antonyms: | bright, cheerful, happy, hopeful, joyful, sunny |
* = informal/non-formal usage
| Main Entry: | hell-bent |
| Part of Speech: | adjective |
| Definition: | set on |
| Synonyms: | bent on, bound and determined, constant, decided, determined, driven, firm, fixed, intent, obsessed, persevering, persistent, relentless, resolute, serious, single-minded, steadfast, strong-willed, stubborn, tenacious, unrelenting, unwavering, resolved, set on, strong-minded, unhesitating |
| Main Entry: | implacable |
| Part of Speech: | adjective |
| Definition: | merciless, cruel |
| Synonyms: | grim, inexorable, inflexible, intractable, mortal, pitiless, relentless, remorseless, ruthless, unbending, uncompromising, unflinching, unforgiving, unrelenting, unyielding, vindictive, ironfisted, rancorous, unappeasable |
| Antonyms: | kind, merciful, nice, placable |
| Main Entry: | incessant |
| Part of Speech: | adjective |
| Definition: | never-ending, persistent |
| Synonyms: | ceaseless, constant, continual, continuous, endless, eternal, everlasting, interminable, monotonous, nonstop, perpetual, relentless, timeless, unbroken, unceasing, unending, unrelenting, day-and-night, interminate, round-the-clock, unremitting |
| Antonyms: | broken, ending, intermittent, interrupted, ceasing |
| Main Entry: | indefatigable |
| Part of Speech: | adjective |
| Definition: | untiring |
| Synonyms: | active, assiduous, bound and determined, determined, diligent, dogged, energetic, hell-bent*, industrious, inexhaustible, ironclad, painstaking, patient, persevering, persistent, pertinacious, relentless, sedulous, steadfast, strenuous, tireless, unfaltering, unflagging, unflinching, unwavering, vigorous, dead set on, nose to grindstone, stop at nothing, unremitting, unwearied, unwearying |
| Antonyms: | fatigued, tired, weary |
* = informal/non-formal usage
| Main Entry: | inexorable |
| Part of Speech: | adjective |
| Definition: | cruel, pitiless |
| Synonyms: | adamant, bound, bound and determined, compulsory, dogged, hard, harsh, immobile, immovable, implacable, ineluctable, inescapable, inflexible, ironclad, mean business*, merciless, necessary, obdurate, obstinate, relentless, remorseless, resolute, rigid, severe, single-minded, stubborn, unbending, uncompromising, unrelenting, unyielding, adamantine, dead set on, hell bent on, like death and taxes, locked in, no going back, set in stone, unappeasable, unmovable |
| Antonyms: | flexible, lenient, merciful, remorseful, yielding |
* = informal/non-formal usage
| Main Entry: | inhuman/inhumane |
| Part of Speech: | adjective |
| Definition: | animal, savage |
| Synonyms: | barbaric, barbarous, bestial, brutal, cannibalistic, cold-blooded, cruel, devilish, diabolical, fell, ferocious, fiendish, fierce, grim, hateful, heartless, implacable, malicious, malign, malignant, mean, merciless, pitiless, relentless, remorseless, ruthless, truculent, unfeeling, unkind, unrelenting, unsympathetic, vicious, uncompassionate |
| Antonyms: | animate, human/humane, sensate |
| Main Entry: | iron |
| Part of Speech: | adjective |
| Definition: | hard, tough; inflexible |
| Synonyms: | adamant, cruel, dense, firm, heavy, immovable, implacable, indomitable, inexorable, insensible, obdurate, relentless, rigid, robust, steel, strong, stubborn, thick, unbending, unyielding, adamantine, ferric, ferrous, steely |
| Antonyms: | flexible, soft, weak |
| Main Entry: | merciless |
| Part of Speech: | adjective |
| Definition: | mean, heartless |
| Synonyms: | barbarous, callous, cruel, cutthroat, dog-eat-dog*, fierce, gratuitous, grim, hard, hardhearted, harsh, hatchet job, implacable, inexorable, mortal, pitiless, relentless, ruthless, severe, uncalled-for, unfeeling, unflinching, unforgiving, unmerciful, unrelenting, unsparing, unsympathetic, unyielding, wanton, compassionless, having a killer instinct, inhumane, iron-fisted, mean machine, unappeasable, unpitying |
| Antonyms: | giving, kind, merciful, nice, sparing, sympathetic |
* = informal/non-formal usage
| Main Entry: | mulish |
| Part of Speech: | adjective |
| Definition: | obstinate |
| Synonyms: | adamant, bullheaded, dogged, firm, hardheaded, headstrong, immovable, inflexible, intractable, obdurate, opinionated, persistent, pigheaded*, recalcitrant, relentless, single-minded, steadfast, stubborn, tenacious, dead set on, strong-minded |
* = informal/non-formal usage
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Copyright © 2009, Dictionary.com, LLC. All rights reserved.
