adjective

unpredictable

unpredictable

The weather here is very unpredictable.

The weather here is very unpredictable.

His moods are unpredictable.

His moods are unpredictable.

((sb./sth.)) is unpredictable (sb./sth.) is not able to be predicted The stock market is unpredictable.

Synonyms: erratic, volatile, uncertain; Antonyms: predictable, stable, reliable

From un- (not) + predict + -able. Not able to be predicted or declared in advance.

Think of it as 'un-predict-able': something you are not able to predict, like a sudden storm or a lottery number.

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