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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

un·pre·dict·a·ble

Audio Help [uhn-pri-dik-tuh-buh

l] Pronunciation Key

–adjective

1.	not predictable; not to be foreseen or foretold: an unpredictable occurrence.

–noun

2.	something that is unpredictable: the unpredictables of life.

[Origin: 1855–60; un-¹ + predictable

]

—Related forms

un·pre·dict·a·bil·i·ty, un·pre·dict·a·ble·ness, noun

un·pre·dict·a·bly, adverb

—Synonyms 1. erratic, fitful, variable, uncertain.

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

Encyclopædia Britannica, Inc.
unpredictable

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American Heritage Dictionary - Cite This Source - Share This

un·pre·dict·a·ble Audio Help   (ŭn'prĭ-dĭk'tə-bəl) Pronunciation Key
adj.   Difficult to foretell or foresee: unpredictable test results; unpredictable behavior.

n.   Something difficult or impossible to foretell or foresee.

un'pre·dict'a·bil'i·ty n., un'pre·dict'a·bly adv.

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Online Etymology Dictionary - Cite This Source - Share This
unpredictable

1857, from un- (1) "not" + predictable (see predict).

WordNet - Cite This Source - Share This

unpredictable
adjective
1.	not capable of being foretold [ant: predictable]
2.	unknown in advance; "an unpredictable (or indeterminable) future"
3.	not occurring at expected times [syn: irregular]