unpredictable

[uhn-pri-dik-tuh-buhl] / ˌʌn prɪˈdɪk tə bəl /

ADJECTIVE

changeable

Synonyms

STRONGEST

erratic fickle uncertain unreliable unstable

WEAK

capricious chance chancy dicey doubtful fluctuating fluky from left field hanging by a thread iffy incalculable inconstant random touch and go touchy unforeseeable up for grabs variable whimsical

Antonyms

STRONGEST

certain definite reliable stable steady sure unchanging

WEAK

constant predictable unvarying

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In a time when the social climate is as unpredictable as the arts, Jake Gyllenhaal is betting on red-blooded masculinity, and the odds are in his favor.

From Salon • May 27, 2026

Studying the species proved challenging because of the unpredictable conditions along Taiwan's northern coastline.

From Science Daily • May 27, 2026

Now they are finding how unpredictable U.S. military decisions can be.

From The Wall Street Journal • May 22, 2026

But SpaceX and its fellow IPOs won’t behave like normal stocks for months, if not longer, and trading promises to be choppy and unpredictable.

From Barron's • May 22, 2026

Scudding clouds raced across the moon and threw shadows in unpredictable patterns.

From "Ophelia" by Lisa Klein

Vocabulary lists containing unpredictable

Power Prefix: un-

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Speak

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Twenty Thousand Leagues Under the Sea

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