Given to changeable emotional states, especially of anger or gloom

• moody

  1. Given to frequent changes of mood; temperamental.
  2. Resulting from or indicating such a mood
  3. Expressive of a mood, especially a sullen or gloomy mood:

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  1. Given to frequent changes of mood; temperamental.
  2. Resulting from or indicating such a mood
  3. Expressive of a mood, especially a sullen or gloomy mood:

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Following no predictable pattern

• capricious

  1. Characterized by, arising from, or subject to caprice; impulsive or unpredictable:
  2. Characterized by or resulting from caprice, inconsistency in feeling or purpose, a whim, or an unpredictable or impulsive behavior. See also arbitrary.
  3. Subject to caprices; tending to change abruptly and without apparent reason; erratic; flighty

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  1. Characterized by, arising from, or subject to caprice; impulsive or unpredictable:
  2. Characterized by or resulting from caprice, inconsistency in feeling or purpose, a whim, or an unpredictable or impulsive behavior. See also arbitrary.
  3. Subject to caprices; tending to change abruptly and without apparent reason; erratic; flighty

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• changeable

  1. Being such that alteration is possible:
  2. Subject to sudden or frequent changes.
  3. That can change or be changed; likely or tending to change; variable; alterable; fickle

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  1. Being such that alteration is possible:
  2. Subject to sudden or frequent changes.
  3. That can change or be changed; likely or tending to change; variable; alterable; fickle

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• erratic

  1. Lacking consistency, regularity, or uniformity:
  2. (Geol.) Designating a boulder or rock formation transported some distance from its original source, as by a glacier
  3. Having no fixed course or purpose; irregular; random; wandering

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  1. Lacking consistency, regularity, or uniformity:
  2. (Geol.) Designating a boulder or rock formation transported some distance from its original source, as by a glacier
  3. Having no fixed course or purpose; irregular; random; wandering

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• fantastic

  1. Existing in or constructed from fantasy; of or relating to fantasy; fanciful.
  2. Strange or fanciful in form, conception, or appearance:
  3. Wonderful; marvelous; excellent; extraordinarily good or great (used especially as an intensifier).

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  1. Existing in or constructed from fantasy; of or relating to fantasy; fanciful.
  2. Strange or fanciful in form, conception, or appearance:
  3. Wonderful; marvelous; excellent; extraordinarily good or great (used especially as an intensifier).

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• fantastical

  1. Of or pertaining to fantasy.
  2. Fanciful or whimsical
  3. Fantastic

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  1. Of or pertaining to fantasy.
  2. Fanciful or whimsical
  3. Fantastic

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• fickle

  1. Changeable or unstable in affection, interest, loyalty, etc.; capricious
  2. Characterized by erratic changeableness or instability, especially with regard to affections or attachments; capricious.
  3. Quick to change one’s opinion or allegiance; insincere; not loyal or reliable.

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  1. Changeable or unstable in affection, interest, loyalty, etc.; capricious
  2. Characterized by erratic changeableness or instability, especially with regard to affections or attachments; capricious.
  3. Quick to change one’s opinion or allegiance; insincere; not loyal or reliable.

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• freakish

  1. Full of or characterized by freaks; whimsical; capricious
  2. Having the nature of a freak; odd; peculiar
  3. Strange, unusual, abnormal or bizarre

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  1. Full of or characterized by freaks; whimsical; capricious
  2. Having the nature of a freak; odd; peculiar
  3. Strange, unusual, abnormal or bizarre

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• inconsistent

  1. Displaying or marked by a lack of consistency, especially:
  2. Not always holding to the same principles or practice; changeable
  3. Lacking in correct logical relation; contradictory:

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  1. Displaying or marked by a lack of consistency, especially:
  2. Not always holding to the same principles or practice; changeable
  3. Lacking in correct logical relation; contradictory:

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• inconstant

  1. Not constant; changeable
  2. Not uniform in nature, value, etc.; irregular; variable
  3. Changing or varying, especially often and without discernible pattern or reason.

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  1. Not constant; changeable
  2. Not uniform in nature, value, etc.; irregular; variable
  3. Changing or varying, especially often and without discernible pattern or reason.

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• mercurial

  1. Having qualities attributed to the god Mercury or supposedly influenced by the planet Mercury; eloquent, clever, shrewd, thievish, etc.
  2. Caused by the action or use of mercury
  3. Having qualities suggestive of mercury; quick, quick-witted, volatile, changeable, fickle, etc.

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  1. Having qualities attributed to the god Mercury or supposedly influenced by the planet Mercury; eloquent, clever, shrewd, thievish, etc.
  2. Caused by the action or use of mercury
  3. Having qualities suggestive of mercury; quick, quick-witted, volatile, changeable, fickle, etc.

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• ticklish

  1. Very sensitive or easily upset; touchy
  2. Needing careful handling; precarious; delicate
  3. Requiring skillful or tactful handling; delicate:

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  1. Very sensitive or easily upset; touchy
  2. Needing careful handling; precarious; delicate
  3. Requiring skillful or tactful handling; delicate:

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• uncertain

  1. Not determined; undecided:
  2. Not definite or determined; vague
  3. Subject to change; variable:

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  1. Not determined; undecided:
  2. Not definite or determined; vague
  3. Subject to change; variable:

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• unpredictable

  1. Unable to be predicted.
  2. Difficult to foretell or foresee:

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  1. Unable to be predicted.
  2. Difficult to foretell or foresee:

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• unstable

  1. Showing or marked by erratic or volatile emotions or behavior.
  2. Having a strong tendency to change.
  3. Changeable; variable; fluctuating

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  1. Showing or marked by erratic or volatile emotions or behavior.
  2. Having a strong tendency to change.
  3. Changeable; variable; fluctuating

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• unsteady

  1. Erratic in habits, purpose, or behavior
  2. Not firm or stable; shaky
  3. Not even or regular; wavering:

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  1. Erratic in habits, purpose, or behavior
  2. Not firm or stable; shaky
  3. Not even or regular; wavering:

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• variable

  1. (Biology) Tending to exhibit genetic variation or variation in a physical trait:
  2. Designating or involving an interest rate, as on a mortgage loan, that varies over time according to some predetermined formula
  3. Likely to change or vary; subject to variation; changeable.

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  1. (Biology) Tending to exhibit genetic variation or variation in a physical trait:
  2. Designating or involving an interest rate, as on a mortgage loan, that varies over time according to some predetermined formula
  3. Likely to change or vary; subject to variation; changeable.

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• volatile

  1. Moving capriciously from one idea, interest, etc. to another; fickle
  2. (Computers) Of or relating to memory whose data is erased when the memory's power is interrupted.
  3. Tending to vary often or widely, as in price:

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  1. Moving capriciously from one idea, interest, etc. to another; fickle
  2. (Computers) Of or relating to memory whose data is erased when the memory's power is interrupted.
  3. Tending to vary often or widely, as in price:

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• whimsical

  1. Full of or characterized by whimsy; quaintly, playfully, or gently humorous
  2. Given to whimsy; capricious; odd; peculiar; playful; light-hearted or amusing.
  3. Subject to sudden change; unpredictable

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  1. Full of or characterized by whimsy; quaintly, playfully, or gently humorous
  2. Given to whimsy; capricious; odd; peculiar; playful; light-hearted or amusing.
  3. Subject to sudden change; unpredictable

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