反复无常 (fǎn fù mó) — unpredictable, capricious, fickle (of a person's mood or behavior); changeable, erratic (of weather, conditions, etc.)

Definition

A four-character idiom for someone or something that keeps changing back and forth with no pattern — mood, personality, weather, or markets. Stricter than 多变, more judgmental of character than simply 变化大.

idiom
unpredictablecapriciousfickle (of a person's mood or behavior)changeableerratic (of weather, conditions, etc.)

Examples

  • 反复无常
    Tā de xìng gé fǎn fù mó, ràng rén hěn nán xìn rèn.
    His personality is fickle, making it hard for people to trust him.
  • 反复无常
    Zuì jìn tiān qì fǎn fù mó, chū mén zuì hǎo dài bǎ sǎn.
    The weather has been changeable lately; better bring an umbrella when going out.
  • 反复无常
    Gǔ shì fǎn fù mó, tóu zī zhě xū yào bǎo chí lěng jìng.
    The stock market is erratic, so investors need to stay calm.

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