capricious
🇺🇸
/kəˈprɪʃəs/
🇬🇧
/kəˈprɪʃəs/
acting or decided on a whim or impulse, unpredictable
The weather was capricious, changing from sunny to rainy in a matter of minutes.
天氣變幻莫測,幾分鐘內就從晴朗轉為下雨。
subject to sudden unpredictable change
The stock market can be capricious, with prices fluctuating wildly.
股市變幻莫測,價格波動劇烈。