| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | given to sudden behavior change |
| Synonyms: | any way the wind blows, arbitrary, blowing hot and cold, careless, changeful, contrary, crotchety, effervescent, erratic, every which way, fanciful, fickle, fitful, flaky*, flighty, freakish, gaga, helter-skelter, humorsome, impulsive, inconstant, kinky*, lubricious, mercurial, moody, mutable, notional, odd, picky*, punchy, queer, quirky, temperamental, ticklish, unpredictable, unreasonable, unstable, up and down, vagarious, variable, volatile, wayward, whimsical, yo-yo |
| Antonyms: | constant, dependable, sensible, staid, steadfast, steady |
| 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: | variable |
| Part of Speech: | adjective |
| Definition: | changing, changeable |
| Synonyms: | capricious, changeful, fickle, fitful, flexible, fluctuating, fluid, iffy, inconstant, irregular, mercurial, mobile, mutable, protean, shifting, shifty, slippery*, spasmodic, temperamental, ticklish, uncertain, unequable, unsettled, unstable, unsteady, vacillating, volatile, waffling, wavering, yo-yo |
| Antonyms: | invariable, unchangeable, unchanging, unvarying |
| Main Entry: | retarded |
| Part of Speech: | adjective |
| Definition: | limited |
| Synonyms: | backward, birdbrained, defective, dim, dim-witted, dopey, dull, dumbbell, dumbo, dumdum, dummy, exceptional, feeble-minded, gorked, half-witted, held back, imbecile, lamebrained, mentally defective, moronic, numbskull, opaque, pinhead, retardo, sappy, simple, simple-minded, slow, slow-witted, stupid, subnormal, touched, underachieving, weak, yo-yo |
| Main Entry: | up-and-down |
| Part of Speech: | adjective |
| Definition: | variable |
| Synonyms: | bobbing, perpendicular, seesaw, uneven, vacillating, vertical, yoyo |