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Comprehensive
Dictionary Suite
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arbitrary resulting from whim or caprice instead of from a rule or reason. [1/3 definitions]
capricious tending to act on impulse; subject to whim or caprice; erratic and unpredictable.
fanciful inclined to indulge in or be ruled by caprice or whim. [1/3 definitions]
whim a sudden odd or capricious desire, impulse, notion, or change of mind; whimsy; caprice.