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English Lexicon

Unpredictability

/ˌʌn.prɪˈdɪk.təˈbɪl.ə.ti/
nounCEFR C1 (Advanced)Top #8450 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    The quality of being impossible to forecast or anticipate because of a lack of foreknowledge or pattern.

    "The inherent unpredictability of the financial markets makes long-term forecasting extremely difficult."
  2. 2

    The state or condition of changing frequently and without warning.

    "She loved the excitement and unpredictability of traveling through unfamiliar cities."
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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from the prefix un- (meaning 'not'), combined with predictable, which stems from the Latin praedicere ('to foretell', from prae- 'before' + dicere 'to say'), paired with the suffix -ability denoting capability or quality. The formation solidified in the late 19th century as modern scientific and probabilistic frameworks increasingly required terminology to describe chaotic or non-deterministic phenomena.

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