Determined or marked by whim or caprice rather than reason

• whimsical

  1. Characterized by, arising from, or subject to whimsy:
  2. Playful or fanciful, especially in a humorous way:

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  1. Characterized by, arising from, or subject to whimsy:
  2. Playful or fanciful, especially in a humorous way:

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• arbitrary

  1. Determined by chance, whim, or impulse, and not by necessity, reason, or principle:
  2. Based on or subject to individual judgment or preference:
  3. Relating to a decision made by a court or legislature that lacks a grounding in law or fact:

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  1. Determined by chance, whim, or impulse, and not by necessity, reason, or principle:
  2. Based on or subject to individual judgment or preference:
  3. Relating to a decision made by a court or legislature that lacks a grounding in law or fact:

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Following no predictable pattern

• whimsical

  1. Characterized by, arising from, or subject to whimsy:
  2. Playful or fanciful, especially in a humorous way:

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  1. Characterized by, arising from, or subject to whimsy:
  2. Playful or fanciful, especially in a humorous way:

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• volatile

  1. Evaporating readily at normal temperatures and pressures.
  2. Capable of being readily vaporized.
  3. Tending to vary often or widely, as in price:

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  1. Evaporating readily at normal temperatures and pressures.
  2. Capable of being readily vaporized.
  3. Tending to vary often or widely, as in price:

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• variable

  1. Likely to change or vary; subject to variation; changeable.
  2. Inconstant; fickle.
  3. Tending to exhibit genetic variation or variation in a physical trait:

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  1. Likely to change or vary; subject to variation; changeable.
  2. Inconstant; fickle.
  3. Tending to exhibit genetic variation or variation in a physical trait:

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• unsteady

  1. Not firm, solid, or securely in place; unstable.
  2. Fluctuating; changeable:
  3. Not even or regular; wavering:

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  1. Not firm, solid, or securely in place; unstable.
  2. Fluctuating; changeable:
  3. Not even or regular; wavering:

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• unstable

  1. Tending strongly to change:
  2. Not constant; fluctuating:
  3. Wavering or fickle:

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  1. Tending strongly to change:
  2. Not constant; fluctuating:
  3. Wavering or fickle:

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• unpredictable

  1. Difficult to foretell or foresee:
  2. Something difficult or impossible to foretell or foresee.

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  1. Difficult to foretell or foresee:
  2. Something difficult or impossible to foretell or foresee.

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• uncertain

  1. Not known or established; questionable:
  2. Not determined; undecided:
  3. Not having sure knowledge:

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  1. Not known or established; questionable:
  2. Not determined; undecided:
  3. Not having sure knowledge:

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• ticklish

  1. Sensitive to tickling.
  2. Easily offended or upset; touchy.
  3. Requiring skillful or tactful handling; delicate:

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  1. Sensitive to tickling.
  2. Easily offended or upset; touchy.
  3. Requiring skillful or tactful handling; delicate:

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• temperamental

  1. Relating to or caused by temperament:
  2. Excessively sensitive or irritable; moody.
  3. Likely to perform unpredictably; undependable:

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  1. Relating to or caused by temperament:
  2. Excessively sensitive or irritable; moody.
  3. Likely to perform unpredictably; undependable:

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• mercurial

  1. Of or relating to the god Mercury.
  2. Of or relating to the planet Mercury.
  3. Having the characteristics of eloquence, shrewdness, swiftness, and thievishness attributed to the god Mercury.

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  1. Of or relating to the god Mercury.
  2. Of or relating to the planet Mercury.
  3. Having the characteristics of eloquence, shrewdness, swiftness, and thievishness attributed to the god Mercury.

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• inconstant

  1. Changing or varying, especially often and without discernible pattern or reason.
  2. Fickle; faithless.

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  1. Changing or varying, especially often and without discernible pattern or reason.
  2. Fickle; faithless.

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• inconsistent

  1. Not regular or predictable; erratic:
  2. Lacking in correct logical relation; contradictory:
  3. Not in agreement or harmony; incompatible:

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  1. Not regular or predictable; erratic:
  2. Lacking in correct logical relation; contradictory:
  3. Not in agreement or harmony; incompatible:

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• freakish

  1. Markedly unusual or abnormal; strange:
  2. Relating to or being a freak:
  3. Capricious or whimsical.

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  1. Markedly unusual or abnormal; strange:
  2. Relating to or being a freak:
  3. Capricious or whimsical.

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• fickle

  1. Characterized by erratic changeableness or instability, especially with regard to affections or attachments; capricious.

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  1. Characterized by erratic changeableness or instability, especially with regard to affections or attachments; capricious.

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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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• fantastic

  1. Based on or existing only in fantasy; unreal:
  2. Strange or fanciful in form, conception, or appearance:
  3. Unrealistic; irrational:

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  1. Based on or existing only in fantasy; unreal:
  2. Strange or fanciful in form, conception, or appearance:
  3. Unrealistic; irrational:

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• erratic

  1. Having no fixed or regular course; wandering:
  2. Lacking consistency, regularity, or uniformity:
  3. Deviating from the customary course in conduct or opinion; eccentric:

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  1. Having no fixed or regular course; wandering:
  2. Lacking consistency, regularity, or uniformity:
  3. Deviating from the customary course in conduct or opinion; eccentric:

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• changeable

  1. Liable to change; capricious:
  2. Being such that alteration is possible:
  3. Varying in color or appearance when seen from different angles:

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  1. Liable to change; capricious:
  2. Being such that alteration is possible:
  3. Varying in color or appearance when seen from different angles:

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