unpredictable Meaning in the Cambridge English Dictionary
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Meaning of “unpredictable” in the English Dictionary

"unpredictable" in British English

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unpredictableadjective

uk   us   /ˌʌn.prɪˈdɪk.tə.bl̩/
B2 likely to ​changesuddenly and without ​reason and ​therefore not ​able to be predicted (= ​expected before it ​happens) or ​depended on: The ​weather there can be unpredictable - one ​minute it's ​blue skies and the next ​minute it's ​pouringrain. The ​hours in this ​job are very unpredictable - you sometimes have to ​work late at very ​shortnotice.
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unpredictability
noun [U] uk   /ˌʌn.prɪ.dɪk.təˈbɪl.ɪ.ti/  us   /-ə.t̬i/
unpredictably
adverb uk   us   /-bli/
(Definition of unpredictable from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"unpredictable" in American English

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unpredictableadjective

 us   /ˌʌn·prɪˈdɪk·tə·bəl/
tending to ​changesuddenly and without ​reason or ​warning, and ​therefore not ​able to be ​depended on: unpredictable ​weather The ​world is ​pretty unpredictable.
unpredictability
noun [U]  /ˌʌn·prɪˌdɪk·təˈbɪl·ət̬·i/
(Definition of unpredictable from the Cambridge Academic Content Dictionary © Cambridge University Press)

"unpredictable" in Business English

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unpredictableadjective

uk   us   /ˌʌnprɪˈdɪktəbl/
if something is unpredictable, it is likely to ​change suddenly and unexpectedly, so cannot be ​planned for: To ​protect it from the unpredictable nature ofsoftwaresales, the ​company has ​adopted a new ​businessmodel.unpredictable effects/events/factors Unpredictable ​events can have a huge ​impact on ​bondvalues. It is a very unpredictable ​market. The turmoil on Wall Street is emblematic of how the ​credit mess is ​spreading in unpredictable ways. an unpredictable ​outcome/​result
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unpredictability
noun [U]
Stocks ​carry more ​risks than ​bonds because of the unpredictability of ​corporateprofits.
unpredictably
adverb
When ​shareprices go up and down unpredictably, ​investors tend to sit on their ​hands.
(Definition of unpredictable from the Cambridge Business English Dictionary © Cambridge University Press)
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