变化无常 (biàn huā) — constantly changing, volatile, unpredictable

Definition

A 成语 meaning 'always changing, never the same' — used for weather, mood, or markets that keep shifting without warning. Stresses instability over mere change.

idiom

constantly changingvolatileunpredictable

Examples

变化无常，。
Zuì jìn tiān qì biàn huā, yí huì r xià yǔ yí huì r qíng tiān.
The weather has been constantly changing lately, raining one moment and sunny the next.
变化无常，。
Tā de qíng xù biàn huā, hěn nán zhī dào tā zài xiǎng shén me.
His mood is so volatile that it's hard to know what he's thinking.
变化无常，。
Shì chǎng biàn huā, tóu zī xū yào jǐn shèn.
The market is constantly changing; investing requires caution.

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