| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | merciless |
| Synonyms: | bound, bound and determined, brick-wall, ceaseless, constant, continual, continuous, cruel, dead set on, endless, grim, hanging tough, hard-headed, implacable, incessant, inexorable, intransigent, iron-fisted, mortal, perpetual, persistent, pitiless, relentless, remorseless, rigid, ruthless, set, steady, stern, stiff, stiff-necked, tenacious, tough, unabated, unbending, unbroken, unflinching, unremitting, unsparing, unwavering, unyielding |
| Antonyms: | compassionate, flexible, merciful, relenting, sympathetic |
| Main Entry: | austere |
| Part of Speech: | adjective |
| Definition: | severe in manner |
| Synonyms: | ascetic, astringent, cold, earnest, exacting, forbidding, formal, grave, grim, hard, harsh, inexorable, inflexible, obdurate, rigid, rigorous, serious, sober, solemn, somber, stern, stiff, strict, stringent, unfeeling, unrelenting |
| Antonyms: | bland, calm, gentle, meek, mild |
| Main Entry: | austere |
| Part of Speech: | adjective |
| Definition: | refraining; abstinent |
| Synonyms: | abstemious, ascetic, chaste, continent, economical, puritanical, self-denying, self-disciplined, sober, straightlaced, strict, subdued, unrelenting |
| Antonyms: | elaborate, encouraging, extravagant, indulgent, spending |
| 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: | 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: | deadly |
| Part of Speech: | adjective |
| Definition: | causing end of life |
| Synonyms: | baleful, baneful, bloodthirsty, bloody, cannibalistic, carcinogenic, cruel, dangerous, death-dealing, deathly, deleterious, destroying, destructive, fatal, grim, harmful, homicidal, injurious, internecine, killing, lethal, malignant, mortal, mortiferous, murderous, noxious, pernicious, pestiferous, pestilent, pestilential, poisonous, ruthless, savage, slaying, suicidal, toxic, unrelenting, venomous, violent, virulent |
| Notes: | deadly means causing or capable of causing death while deathly means having the physical appearance of death |
| Antonyms: | animating, energizing, harmless, healthful, healthy, invigorating, wholesome |
| Main Entry: | diligent |
| Part of Speech: | adjective |
| Definition: | persevering, hard-working |
| Synonyms: | active, assiduous, attentive, busy, careful, conscientious, constant, eager, eager beaver, earnest, grind*, indefatigable, industrious, laborious, occupied, operose, painstaking, persistent, persisting, pertinacious, plugging, sedulous, steadfast, studious, tireless, unflagging, unrelenting, untiring |
| Antonyms: | inactive, indifferent, languid, lazy, lethargic, negligent |
| Main Entry: | grim |
| Part of Speech: | adjective |
| Definition: | hopeless, horrible in manner, appearance |
| Synonyms: | austere, barbarous, bleak, cantankerous, churlish, crabbed, cruel, crusty, dogged, ferocious, fierce, forbidding, foreboding, formidable, frightful, funereal, ghastly, gloomy, glowering, glum, grisly, grouchy, gruesome, grumpy*, harsh, hideous, horrid, implacable, inexorable, intractable, merciless, morose, ominous, relentless, resolute, ruthless, scowling, severe, shocking, sinister, somber, sour, splenetic, stern, stubborn, sulky, sullen, surly, terrible, truculent, unrelenting, unyielding |
| Antonyms: | bright, cheerful, happy, hopeful, joyful, sunny |
| Main Entry: | hard |
| Part of Speech: | adjective |
| Definition: | cruel, ruthless |
| Synonyms: | acrimonious, angry, antagonistic, austere, bitter, bleak, brutal, callous, cold, cold fish, cold-blooded, dark, disagreeable, distressing, dour, exacting, grievous, grim, hard as nails, hard-boiled, harsh, hostile, inclement, intemperate, intolerable, obdurate, painful, perverse, pitiless, rancorous, resentful, rigorous, rugged, severe, stern, strict, stringent, stubborn, thick-skinned, tough, unfeeling, unjust, unkind, unpleasant, unrelenting, unsparing, unsympathetic, vengeful |
| Antonyms: | merciful, mild, nice, pleasant, sensitive, sympathetic |