| Main Entry: | up-and-down |
| Part of Speech: | adjective |
| Definition: | variable |
Synonyms: |
bobbing, perpendicular, seesaw, uneven, vacillating, vertical, yoyo |
| Main Entry: | impulsive |
| Part of Speech: | adjective |
| Definition: | tending to act without thought |
Synonyms: |
abrupt, ad-lib, automatic, careless, devil-may-care, emotional, extemporaneous, flaky*, gone off deep end, hasty, headlong, hot-and-cold, impetuous, instinctive, intuitive, involuntary, jumping the gun, mad, offhand, passionate, precipitate, quick, rash, spontaneous, sudden, swift, unconsidered, unexpected, unmeditated, unpredictable, unpremeditated, unprompted, up-and-down, violent, winging it |
| Notes: | a compulsive eater is compelled by an exterior force to eat and eats constantly; an impulsive eater is impelled (has an impulse) to eat, occurring sporadically, and eats only from time to time |
Antonyms: |
cautious, considering, heedful, premeditative, thoughtful, wise |
| 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: | vertical |
| Part of Speech: | adjective |
| Definition: | upright |
Synonyms: |
bolt upright, cocked, erect, on end, perpendicular, plumb, sheer, steep, straight-up, up-and-down, upward |
Antonyms: |
horizontal, prone |
| Main Entry: | volatile |
| Part of Speech: | adjective |
| Definition: | explosive, changeable |
Synonyms: |
airy, buoyant, capricious, effervescent, elastic, elusive, ephemeral, erratic, expansive, fickle, fleeting, flighty, flippant, frivolous, fugacious, fugitive, gaseous, gay, giddy, impermanent, imponderable, inconsistent, inconstant, light, lively, lubricious, mercurial, momentary, playful, resilient, short-lived, sprightly, subtle, temperamental, ticklish, transient, transitory, unsettled, unstable, unsteady, up-and-down, vaporous, variable, whimsical |
Antonyms: |
calm, firm, stable, steadfast |
| Main Entry: | volatile |
| Part of Speech: | adjective |
Related
Adjectives: |
volatile, evaporable, reeking, vaporizable, volatilized
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