adjective
subject to, led by, or indicative of a sudden, odd notion or unpredictable change; erratic
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The decision-making process of the committee seemed capricious and unpredictable.
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Her mood swings are so capricious, you never know how she'll react.
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The weather in this city is so capricious, it changes every five minutes.
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The stock market can be capricious, causing investors to constantly adjust their strategies.