Synonyms: capricious, impulsive, whimsical
Definition: determined by chance or impulse or whim rather than by necessity or reason
Usage: a capricious refusal; authoritarian rulers are frequently capricious; the victim of whimsical persecutions
Similar words: arbitrary
Definition: based on or subject to individual discretion or preference or sometimes impulse or caprice
Usage: an arbitrary decision; the arbitrary rule of a dictator; an arbitrary penalty; of arbitrary size and shape; an arbitrary choice; arbitrary division of the group into halves
Synonyms: capricious, freakish
Definition: changeable
Usage: a capricious summer breeze; freakish weather
Similar words: unpredictable
Definition: not capable of being foretold