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unpredictable

unpredictable

163 4.4
Likely to change suddenly and hard to know in advance
  • adjective
  • /ˌʌnprɪˈdɪktəbl/
translation icon : impredecible
  • Life is unpredictable and it's the surprises that make it worth living.
  • unpredictable outcomes
  • often unpredictable
  • unpredictable environment

Trump is very unpredictable in this regard.

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Examples

  • Rising temperatures and unpredictable rainy seasons have hit them hard.

  • Put simply, religious regimes are too unpredictable to be trusted with nuclear weapons.

    Academic text (2011)
  • This past year has been a challenging, unpredictable time for our world.

  • Some leave patients stable for long but unpredictable periods, while others get rapidly worse.

    Academic text (2011)
  • Lockhart himself followed an unpredictable path to success in the film trade.

    Academic text (2008)
  • "The rains are more and more unpredictable, starting late, ending early, or never arriving at all," said Heath.

    Academic text (2011)
  • The effects of dementia are confusing, unpredictable, infuriating; sad, awful, funny.

    Academic text (2008)
  • Interaction among components is nonlinear and can give rise to unpredictable responses.

    Academic text (2011)
  • The weather in this region is often unpredictable, changing from sunny to rainy in minutes.

  • Her moods can be quite unpredictable, making it hard to know how she'll react.

Synonyms

random
vsunpredictable
527 3.4

Happening without a plan and by chance

covers events caused by randomness as well as sudden shifts
uncertain
vsunpredictable
149 2.8

Not known for sure and likely to change

adds that events can arrive suddenly or at irregular times
erratic
vsunpredictable
94 6.1

Not regular or predictable and likely to change suddenly

is about lack of predictability rather than just odd behavior
unstable
vsunpredictable
80 4.4

Not steady and likely to change, fail, or fall

points to sudden changes in timing or occurrence rather than overall insecurity
volatile
vsunpredictable
77 7.0

Likely to change suddenly and become more dangerous

focuses on sudden change rather than danger or volatility
irregular
vsunpredictable
27 3.5

Happening at no fixed times

highlights sudden change and timing variability beyond simple unevenness
chaotic
vsunpredictable
  • Specialized
9 7.2

A system where small changes cause very different results that are hard to predict

is ordinary lack of predictability, not specialized scientific sensitivity
unforeseeable
vsunpredictable
5 6.7

Impossible to know before it happens

emphasizes sudden timing and irregular occurrence as well as unpredictability
stochastic
vsunpredictable
  • Specialized
4 9.9

Having events or results that happen by chance you cannot predict

is a plain description of not being able to be predicted
inconstant
vsunpredictable
2 7.5

Changing often and not staying the same

focuses on sudden timing and varied occurrence instead of mere frequency
unsettled
vsunpredictable
2 4.3

Weather that often changes, bringing rain or strong wind

emphasizes sudden or irregular timing more than general lack of fixity
aleatory
vsunpredictable
  • Formal
9.9

Unpredictable because it depends on chance

is broader, covering sudden or irregular changes not only luck
indeterministic
vsunpredictable
  • Specialized
9.2

Having no single predictable result because chance affects it

is a general lack of predictability including sudden timing changes
nondeterministic
vsunpredictable
  • Specialized
9.1

A process that can give different results with the same input, often in computer science

is everyday lack of predictability, not limited to technical processes
nonpredictive
vsunpredictable
  • Specialized
7.2

Not able to correctly say what will happen

is about sudden or irregular events rather than forecasting tools
unpredictive
vsunpredictable
  • Specialized
7.8

Not able to tell what will happen next

describes the event quality of unpredictability rather than forecasting failure
chanceful
vsunpredictable
  • Archaic
8.7

Likely to involve risk or an uncertain result

stresses sudden or irregular occurrence as part of lack of predictability

Antonyms

473 2.3

Not likely to change and stays steady over time

189 2.5

Easy to guess what will happen

How Predictable

predictable
189 2.5
inconsistent
96 4.7
unpredictable
163 4.4
erratic
94 6.1
random
527 3.4

Surface Forms

unpredictable positive

Morphology

unpredictable = predictable (transparent) = un + predict + able

The adjective is formed by adding the productive prefix 'un-' to 'predictable', which itself is transparently 'predict' + '-able'.

Etymology

Unpredictable breaks into un- 'not', predict 'say in advance', and -able 'can', so it means 'not able to be said in advance'. That's why something unpredictable cannot be known before and can change suddenly.