| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | effervescent, vivacious |
| Synonyms: | boisterous, bubbling, buoyant, ebullient, enthusiastic, insuppressible, rebellious, rhapsodical, tumultous/tumultuous, unconstrained, uncontainable, uncontrollable, unmanageable, unquenchable, unrestrainable, unrestrained, unruly, unstoppable |
| Antonyms: | depressed, despondent, grave, hopeless, serious |
| Main Entry: | effervescent |
| Part of Speech: | adjective |
| Definition: | enthusiastic, vivacious |
| Synonyms: | animated, bouncy, brash, bubbly, buoyant, ebullient, excited, exhilarated, exuberant, gleeful, happy, high-spirited, hilarious, in high spirits, irrepressible, jolly, joyous, lively, merry, mirthful, sprightly, vital, zingy |
| Antonyms: | dull, inactive, serious, sober, unenthusiastic |
| Main Entry: | elastic |
| Part of Speech: | adjective |
| Definition: | pliant, rubbery |
| Synonyms: | adaptable, bouncy, buoyant, ductile, extendible, extensible, flexible, irrepressible, limber, lithe, malleable, moldable, plastic, pliable, resilient, rubberlike, springy, stretchable, stretchy, supple, tempered, yielding |
| Antonyms: | inelastic, rigid, stiff, tense, unflexible, unyielding |
| Main Entry: | hysterical |
| Part of Speech: | adjective |
| Definition: | very upset, excited |
| Synonyms: | agitated, berserk, beside oneself, blazing, carried away, convulsive, crazed, crazy, delirious, distracted, distraught, emotional, fiery, frantic, frenzied, fuming, furious, impassioned, impetuous, in a fit, incensed, irrepressible, mad, maddened, nervous, neurotic, overwrought, panic-stricken, passionate, possessed, rabid, raging, rampant, raving, seething, spasmodic, tempestuous, turbulent, uncontrollable, uncontrolled, unnerved, unrestrained, uproarious, vehement, violent, wild, worked up |
| Antonyms: | calm, controlled, serene |
| Main Entry: | mercurial |
| Part of Speech: | adjective |
| Definition: | flighty, temperamental |
| Synonyms: | blowing hot and cold, bubbleheaded, buoyant, capricious, changeable, effervescent, elastic, erratic, expansive, fickle, flaky, flip*, fluctuating, gaga, gay, impulsive, inconstant, irregular, irrepressible, lighthearted, lively, lubricious, mad, mobile, movable, quicksilver, resilient, short-fuse, spirited, sprightly, ticklish, unpredictable, unstable, up-and-down, variable, volatile, yo-yo |
| Antonyms: | calm, tranquil, unchangeable, unperturbable, unvarying |
| Main Entry: | resilient |
| Part of Speech: | adjective |
| Definition: | bouncy, flexible |
| Synonyms: | airy, buoyant, effervescent, elastic, expansive, hardy, irrepressible, plastic, pliable, quick to recover, rebounding, rolling with punches, rubbery, snapping back, springy, stretchy, strong, supple, tough, volatile |
| Antonyms: | hard, inflexible, rigid, stiff |
| Main Entry: | uncontrollable |
| Part of Speech: | adjective |
| Definition: | wild; carried away |
| Synonyms: | beside oneself, disorderly, excited, fractious, frantic, freaked, furious, headstrong, indocile, indomitable, insuppressible, insurgent, intractable, irrepressible, irresistible, lawless, like a loose cannon, mad, obdurate, obstinate, recalcitrant, strong, stubborn, uncontainable, undisciplinable, undisciplined, ungovernable, unmanageable, unrestrainable, unruly, violent |
| Antonyms: | controllable, controlled, manageable, mild, moderate |
| Main Entry: | ungovernable |
| Part of Speech: | adjective |
| Definition: | rebellious |
| Synonyms: | disobedient, disorderly, fractious, impetuous, impotent, intractable, irrepressible, mutinous, rampant, refractory, unbridled, uncontrollable, undisciplined, unmanageable, unruly, wild |
| Antonyms: | orderly |
| Main Entry: | unconquerable |
| Part of Speech: | adjective |
| Definition: | insurmountable |
| Synonyms: | impregnable, indefeasible, indomitable, inexpugnable, innate, insuperable, intractable, invincible, invulnerable, irrepressible, resistant, secure, unbeatable, unsurpassable, unyielding |
| Antonyms: | conquerable |