| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | stubborn |
| Synonyms: | adamant, adamantine, determined, dogged, dyed-in-the-wool, firm, fixed, hard, hard-and-fast, immovable, immutable, implacable, indomitable, inexorable, intractable, iron, obdurate, obstinate, relentless, resolute, rigid, rigorous, set, set in one's ways, single-minded, stand one's ground, staunch, steadfast, steely, stiff, strict, stringent, unadaptable, unbending, unchangeable, uncompliant, uncompromising, unrelenting, unswayable, unyielding |
| Antonyms: | flexible, reasonable, willing, yielding |
| Main Entry: | invincible |
| Part of Speech: | adjective |
| Definition: | indestructible |
| Synonyms: | bulletproof, impassable, impregnable, indomitable, insuperable, inviolable, invulnerable, irresistible, powerful, strong, unassailable, unattackable, unbeatable, unconquerable, undefeatable, unsurmountable, untouchable, unyielding |
| Antonyms: | beatable, breakable, conquerable, destructible |
| Main Entry: | iron |
| Part of Speech: | adjective |
| Definition: | hard, tough; inflexible |
| Synonyms: | adamant, adamantine, cruel, dense, ferric, ferrous, firm, heavy, immovable, implacable, indomitable, inexorable, insensible, obdurate, relentless, rigid, robust, steel, steely, strong, stubborn, thick, unbending, unyielding |
| Notes: | ferrum is the Latin name for iron, from which its chemical symbol Fe is derived; iron exists in various states of impurity and it is processed to produce cast iron, wrought iron, etc. and steel (steel is iron to which carbon and other things have been added) |
| Antonyms: | flexible, soft, weak |
| Main Entry: | merciless |
| Part of Speech: | adjective |
| Definition: | mean, heartless |
| Synonyms: | barbarous, callous, compassionless, cruel, cutthroat, dog-eat-dog, fierce, gratuitous, grim, hard, hardhearted, harsh, hatchet job, having a killer instinct, implacable, inexorable, inhumane, iron-fisted, mean machine, mortal, pitiless, relentless, ruthless, severe, unappeasable, uncalled-for, unfeeling, unflinching, unforgiving, unmerciful, unpitying, unrelenting, unsparing, unsympathetic, unyielding, wanton |
| Antonyms: | giving, kind, merciful, nice, sparing, sympathetic |
| Main Entry: | obdurate |
| Part of Speech: | adjective |
| Definition: | pigheaded, stubborn |
| Synonyms: | adamant, bullhead, callous, cold fish, dogged, firm, fixed, hanging tough, hard, hard-boiled, hard-hearted, hard-nosed, harsh, heartless, immovable, implacable, indurate, inexorable, inflexible, iron, mean, mulish, obstinate, perverse, relentless, rigid, set in stone, stiff-necked, thick-skinned, tough, tough nut to crack, unbending, uncompassionate, uncompromising, uncooperative, unemotional, unfeeling, unimpressible, unrelenting, unshakable, unsympathetic, unyielding |
| Antonyms: | amenable, gentle, submissive, susceptible, yielding |
| Main Entry: | obstinate |
| Part of Speech: | adjective |
| Definition: | stubborn, determined |
| Synonyms: | adamant, cantankerous, contradictory, contrary, contumacious, convinced, dead set on, dogged, dogmatic, firm, hard, hardened, headstrong, heady, immovable, indomitable, inflexible, intractable, intransigent, locked in, mulish, obdurate, opinionated, opinionative, persistent, pertinacious, perverse, pigheaded, recalcitrant, refractory, relentless, resolved, restive, self-willed, steadfast, strong-minded, tenacious, unalterable, unflinching, unmanageable, unyielding, willful |
| Antonyms: | agreeable, amenable, cooperative, flexible, helpful, submissive, willing, yielding |
| Main Entry: | opinionated |
| Part of Speech: | adjective |
| Definition: | believing very strongly and conveying it |
| Synonyms: | adamant, arbitrary, assertive, biased, bigoted, bossy, bullheaded, cocksure, cocky*, conceited, dictatorial, doctrinaire, dogmatic, hard-line, high-handed, inflexible, intransigent, locked in, obdurate, obstinate, one-sided, oracular, overbearing, pigheaded, positive, pragmatic, pragmatical, prejudiced, self-assertive, set in stone, set-on, single-minded, stubborn, tilted, uncompromising, unyielding, weighted |
| Antonyms: | compromising, indifferent, open-minded |
| Main Entry: | perverse |
| Part of Speech: | adjective |
| Definition: | mean, ornery; troublesome |
| Synonyms: | abnormal, bad-tempered, cantankerous, capricious, contradictory, contrary, contumacious, corrupt, crabby, cross, degenerate, delinquent, depraved, deviant, disobedient, dogged, erring, fractious, hard-nosed, headstrong, intractable, intransigent, irritable, miscreant, mulish, nefarious, obdurate, obstinate, petulant, pigheaded, rebellious, refractory, rotten*, self-willed, spiteful, stubborn, unhealthy, unmanageable, unreasonable, unyielding, villainous, wayward, wicked, willful |
| Antonyms: | agreeable, compliant, happy, nice, reasonable, willing |
| Main Entry: | pigheaded |
| Part of Speech: | adjective |
| Definition: | stubborn |
| Synonyms: | bullheaded, contrary, dense*, forward, headstrong, inflexible, insistent, intractable, mulish, obstinate, perverse, recalcitrant, self-willed, stiff-necked, stupid*, unyielding, willful |
| Antonyms: | flexible, reasonable, submissive, willing |