Meaning & use
unpredictable
Not able to be known or foreseen in advance; likely to change without warning.
See it in a sentence
Mountain weather can be unpredictable, changing from sunshine to storm within an hour.
His unpredictable temper made his coworkers nervous around him all day.
A note on using this word
Unpredictable often implies a degree of risk or instability, more than simply uncertain.
Words with a similar meaning
erraticuncertain
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
predictableconsistent
Make it your own
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