relentless

Main Entry:
relentless [ri-lent-lis]
Part of Speech: adjective
Definition: cruel, merciless
Synonyms: adamant, bound, bound and determined, dead set on, determined, dogged, ferocious, fierce, go for broke, grim, hang in, hang-tough, hard, harsh, implacable, inexorable, inflexible, inhuman, mortal, obdurate, pitiless, remorseless, rigid, rigorous, ruthless, single-minded, stiff, stop at nothing, strict, stringent, unappeasable, unbending, uncompromising, undeviating, unflinching, unforgiving, unrelenting, unstoppable, unyielding, vindictive
Antonyms: kind, merciful, sympathetic, understanding
Main Entry: adamant
Part of Speech: adjective
Definition: unyielding
Synonyms: determined, firm, fixed, hanging tough, hard-nosed, immovable, inexorable, inflexible, insistent, intransigent, obdurate, pat, relentless, resolute, rigid, set, set in stone, standing pat, stiff, stubborn, unbendable, unbending, uncompromising, unrelenting, unshakable, unswayable
Antonyms: flexible, pliant, submissive, yielding
Main Entry: cold-blooded
Part of Speech: adjective
Definition: cruel, heartless
Synonyms: barbarous, brutal, callous, cold, dispassionate, hard-boiled, hard-hearted, hardened, imperturbable, inhuman, matter-of-fact, merciless, obdurate, pitiless, relentless, ruthless, savage, steely, stony-hearted, uncompassionate, unemotional, unfeeling, unmoved
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: constant
Part of Speech: adjective
Definition: neverending
Synonyms: abiding, ceaseless, chronic, continual, continuous, endless, enduring, eternal, everlasting, incessant, interminable, lasting, nonstop, perpetual, persistent, persisting, relentless, sustained, unending, uninterrupted, unrelenting, unremitting
Antonyms: concluding, ending, interrupted, stopping, terminable, terminating
Main Entry: continual
Part of Speech: adjective
Definition: constant, incessant
Synonyms: aeonian, around-the-clock, ceaseless, connected, consecutive, continuous, dateless, endless, enduring, eternal, everlasting, frequent, interminable, oft-repeated, permanent, perpetual, persistent, persisting, recurrent, regular, relentless, repeated, repetitive, running, staying, steady, timeless, unbroken, unceasing, unchanging, unending, unfailing, unflagging, uninterrupted, unremitting, unvarying, unwaning
Notes: continually means 'repeatedly, with breaks in between' and continuously means 'without interruption, in an unbroken stream'; continual typically refers to time while continuous can refer to space as well as time
Antonyms: broken, ceasing, checked, halting, inconstant, infrequent, intermittent, interrupted, occasional, temporary
Main Entry: cruel
Part of Speech: adjective
Definition: vicious, pitiless; causing pain
Synonyms: atrocious, barbarous, bestial, bitter, bloodthirsty, brutal, brutish, callous, cold-blooded, degenerate, demoniac, depraved, evil, excruciating, ferocious, fierce, flinty, hard, hard-hearted, harsh, hateful, heartless, hellish, implacable, inexorable, inhuman, inhumane, malevolent, merciless, monstrous, painful, pernicious, poignant, rancorous, relentless, revengeful, ruthless, sadistic, sinful, spiteful, tyrannical, unfeeling, unkind, unnatural, unrelenting, vengeful, vicious, virulent, wicked
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, hard as nails, merciless, pitiless, relentless, savage, unprincipled, vicious
Main Entry: dogged
Part of Speech: adjective
Definition: determined, persistent
Synonyms: adamant, bullheaded, firm, hanging tough, hard-nosed, hardheaded, indefatigable, inexorable, inflexible, insistent, mulish, obdurate, obstinate, perseverant, perseverative, persevering, pertinacious, pigheaded, relentless, resolute, rigid, single-minded, staunch, steadfast, steady, stubborn, tenacious, tough nut, unbending, unflagging, unshakable, unyielding
Antonyms: indifferent, irresolute, undetermined, yielding
Main Entry: eternal
Part of Speech: adjective
Definition: without pause; endless
Synonyms: abiding, ageless, always, amaranthine, boundless, ceaseless, constant, continual, continued, continuous, dateless, deathless, enduring, everlasting, forever, illimitable, immemorial, immortal, immutable, imperishable, incessant, indefinite, indestructible, infinite, interminable, lasting, never-ending, perdurable, perennial, permanent, perpetual, persistent, relentless, termless, timeless, unbroken, unceasing, undying, unending, unfading, uninterrupted, unremitting, without end
Antonyms: brief, changeable, changing, ending, ephemeral, stopping, temporary, terminable, transient
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