| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | steadfast, unyielding |
| Synonyms: | dogged, impassable, impregnable, insuperable, insurmountable, invincible, invulnerable, obstinate, pertinacious, resolute, ruthless, staunch, stubborn, unassailable, unbeatable, unconquerable, undefeatable, unflinching, willful |
| Antonyms: | beatable, conquerable, unstable, weak, yielding |
| Main Entry: | courageous |
| Part of Speech: | adjective |
| Definition: | brave, bold |
| Synonyms: | Spartan, Trojan, adventuresome, adventurous, assured, audacious, cool, daredevil, daring, dauntless, doughty, fearless, fiery, fire-eating, gallant, game, gritty, gutsy, hardy, heroic, high-spirited, impavid, indomitable, intrepid, lionhearted, martial, nervy, plucky, red-blooded, resolute, stalwart, stand tall, stouthearted, strong, tenacious, tough, unafraid, undaunted, valiant, valorous, venturesome, venturous |
| Antonyms: | cowardly, faint-hearted, fearful, fearing, meek, shy, timid, weak |
| Main Entry: | dauntless |
| Part of Speech: | adjective |
| Definition: | bold, courageous |
| Synonyms: | aweless, brave, daring, doughty, fearless, gallant, game, heroic, indomitable, intrepid, invincible, lionhearted, resolute, stouthearted, unafraid, unconquerable, undaunted, unfearing, unflinching, valiant, valorous |
| Antonyms: | afraid, daunted, discouraged, disheartened, fearful, frightened, intimidated, scared, terrified |
| Main Entry: | fearless |
| Part of Speech: | adjective |
| Definition: | brave, unafraid |
| Synonyms: | assured, aweless, bodacious, bold, brassy, cheeky, chesty, cocky, confident, cool hand, courageous, crack*, daring, dashing, dauntless, doughty, flip*, fresh*, gallant, game, gritty, gutsy, heroic, icy*, indomitable, intrepid, lionhearted, nervy, plucky, salty, sanguine, sassy*, smart, spunky, sure, temerarious, unabashed, undaunted, unflinching, valiant, valorous, wise |
| Antonyms: | afraid, apprehensive, fearful, timid |
| Main Entry: | formidable |
| Part of Speech: | adjective |
| Definition: | difficult, overwhelming |
| Synonyms: | all-powerful, arduous, awesome, ballbuster, challenging, colossal, dismaying, effortful, great, hard, impressive, indomitable, intimidating, labored, laborious, mammoth, mighty, murder*, onerous, overpowering, powerful, puissant, rough go, rough*, staggering, strenuous, tall order, toilsome, tough proposition, tough*, tremendous, uphill |
| Antonyms: | easy, not hard, pleasant, trivial |
| Main Entry: | fractious |
| Part of Speech: | adjective |
| Definition: | grouchy, cross |
| Synonyms: | awkward, captious, crabby, disorderly, fretful, froward, huffy, indocile, indomitable, intractable, irritable, mean, ornery*, peevish, perverse, pettish, petulant, querulous, recalcitrant, refractory, restive, scrappy, snappish, testy, thin-skinned, touchy, uncompliant, undisciplined, unmanageable, unruly, wayward, wild |
| Notes: | factious means addicted to forming parties and raise dissensions in opposition to government or the common good, while fractious means tending to cause trouble or unruly or irritable |
| Antonyms: | agreeable, complaisant, happy, nice, patient |
| Main Entry: | gutsy |
| Part of Speech: | adjective |
| Definition: | bold, brave |
| Synonyms: | courageous, determined, gallant, game*, indomitable, intrepid, mettlesome, plucky, resolute, spirited, spunky*, staunch, unfearful, valiant |
| Antonyms: | cowardly, fearful, timid |
| Main Entry: | inflexible |
| 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: | insurmountable |
| Part of Speech: | adjective |
| Definition: | impossible |
| Synonyms: | forget it, hopeless, impassable, impregnable, inaccessible, indomitable, ineluctable, insuperable, invincible, no way, no-win, not a prayer, overwhelming, unbeatable, unconquerable, unmasterable |
| Antonyms: | attainable, beatable, defeatable, possible, surmountable |