Synonyms for Un-relenting:

• adj.

  •adamant (adjective)
  • fixed,
  • resolute,
  • standing pat,
  • obdurate,
  • determined,
  • hard-nosed,
  • unrelenting,
  • inflexible,
  • firm,
  • Unswayable,
  • unbendable,
  • unshakable,
  • insistent,
  • set in stone,
  • stubborn,
  • immovable,
  • uncompromising,
  • pat.
  •austere (adjective)
  • cold,
  • harsh,
  • chaste,
  • unfeeling,
  • hard,
  • sober,
  • straightlaced,
  • self-denying,
  • earnest,
  • astringent,
  • abstemious,
  • economical,
  • forbidding,
  • subdued,
  • rigorous,
  • exacting,
  • somber,
  • stringent,
  • formal,
  • grave,
  • continent,
  • puritanical,
  • serious,
  • ascetic,
  • strict,
  • solemn,
  • self-disciplined.
  •constant (adjective)
  • interminable,
  • unending,
  • enduring,
  • eternal,
  • uninterrupted,
  • nonstop,
  • abiding,
  • persisting,
  • chronic,
  • sustained,
  • lasting,
  • everlasting.
  •cruel (adjective)
  • heartless,
  • excruciating,
  • hellish,
  • bloodthirsty,
  • atrocious,
  • pernicious,
  • demoniac,
  • fierce,
  • flinty,
  • barbarous,
  • callous,
  • malevolent,
  • tyrannical,
  • revengeful,
  • sinful,
  • rancorous,
  • degenerate,
  • vengeful,
  • monstrous,
  • cold-blooded,
  • inhumane,
  • unnatural,
  • bestial,
  • virulent,
  • painful,
  • ferocious,
  • hateful,
  • Hard-hearted,
  • vicious,
  • bitter,
  • spiteful,
  • unkind,
  • wicked,
  • inhuman,
  • brutish,
  • brutal,
  • evil,
  • poignant,
  • depraved,
  • sadistic,
  • merciless.
  •deadly (adjective)
  • savage,
  • poisonous,
  • pestilent,
  • murderous,
  • pestiferous,
  • pestilential,
  • malignant,
  • cannibalistic,
  • baneful,
  • baleful,
  • destructive,
  • carcinogenic,
  • injurious,
  • harmful,
  • killing,
  • fatal,
  • bloody,
  • venomous,
  • internecine,
  • suicidal,
  • toxic,
  • Destroying,
  • noxious,
  • homicidal,
  • Mortiferous,
  • violent,
  • lethal,
  • slaying,
  • dangerous,
  • deleterious,
  • deathly,
  • death-dealing.
  •diligent (adjective)
  • industrious,
  • assiduous,
  • attentive,
  • busy,
  • eager,
  • careful,
  • painstaking,
  • eager beaver,
  • active,
  • steadfast,
  • Plugging,
  • studious,
  • conscientious,
  • tireless,
  • occupied,
  • untiring,
  • unflagging,
  • sedulous,
  • laborious,
  • Operose,
  • pertinacious,
  • indefatigable.
  •grim (adjective)
  • grisly,
  • funereal,
  • sinister,
  • frightful,
  • crabbed,
  • gloomy,
  • hideous,
  • terrible,
  • gruesome,
  • shocking,
  • ominous,
  • severe,
  • horrid,
  • bleak,
  • morose,
  • glowering,
  • crusty,
  • glum,
  • cantankerous,
  • splenetic,
  • churlish,
  • grouchy,
  • sulky,
  • sour,
  • scowling,
  • austere,
  • sullen,
  • truculent,
  • intractable,
  • ghastly,
  • surly,
  • formidable,
  • dogged,
  • foreboding.
  •hard (adjective)
  • hard-boiled,
  • angry,
  • antagonistic,
  • cold fish,
  • distressing,
  • dark,
  • intemperate,
  • dour,
  • acrimonious,
  • resentful,
  • hard as nails,
  • rugged,
  • disagreeable,
  • thick-skinned,
  • inclement,
  • unpleasant,
  • unjust,
  • perverse,
  • hostile,
  • unsympathetic,
  • intolerable,
  • grievous.
  •unrelenting (adjective)
  • rigid,
  • perpetual,
  • ruthless,
  • continuous,
  • bound,
  • tough,
  • inexorable,
  • pitiless,
  • relentless,
  • ceaseless,
  • grim,
  • stern,
  • unwavering,
  • unbroken,
  • unremitting,
  • unbending,
  • incessant,
  • Iron-fisted,
  • stiff-necked,
  • implacable,
  • steady,
  • Hard-headed,
  • constant,
  • dead set on,
  • tenacious,
  • persistent,
  • remorseless,
  • hanging tough,
  • brick-wall,
  • continual,
  • unsparing,
  • unyielding,
  • bound and determined,
  • set,
  • endless,
  • cruel,
  • mortal,
  • unabated,
  • intransigent,
  • unflinching,
  • stiff.

Antonyms for Un-relenting:

• adj.

  • adamant
    submissive, yielding, pliant.
  • austere
    calm, elaborate, meek, spending, bland, encouraging, gentle, extravagant, indulgent, mild.
  • constant
    interrupted, concluding, stopping, ending, terminable, Terminating.
  • cruel
    feeling, charitable, kind, considerate, thoughtful, uncruel.
  • deadly
    healthful, harmless, animating, energizing, invigorating, healthy, wholesome.
  • diligent
    languid, inactive, lazy, indifferent, lethargic, negligent.
  • grim
    happy, bright, hopeful, cheerful, joyful, sunny.
  • hard
    pleasant, sensitive, nice.
  • unrelenting
    flexible, Relenting, sympathetic, compassionate, merciful.