What does it mean to be uncertain?

1. Uncertainty means: the weather is unstable and the changes in sunshine and rain are unpredictable. It is a metaphor for people being moody and emotionally unstable.

2. Usage: as predicate and object.

3. Synonyms: moodiness, joy, anger, sorrow, and joy.

4. Antonyms: immutable, gentle.

5. Source: Chapter 45 of "A Dream of Red Mansions" by Cao Xueqin of the Qing Dynasty: Before the sun set, the sky changed and it started to rain. Autumn is rainy and rainy, and the weather is cloudy and sunny. (Vernacular text: Unexpectedly, the sky has changed before the sun goes down, and there is a sound of light rain falling. In autumn, it is drizzly, the weather is unstable, and the changes of sunshine and rain are unpredictable.

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