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erratic

erratic

94 6.1
Not regular or predictable and likely to change suddenly
  • adjective
  • /ɪˈrætɪk/
translation icon : errático
  • I've been dealing with her erratic behavior for years.
  • erratic behavior
  • erratic attendance
  • erratic and unpredictable

When you wound up uptight, you are the most erratic version of yourself.

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Examples

  • Is there an explanation for his erratic behavior... in the last few days?

  • Your breathing has become erratic.

  • And so some of these effects can be erratic in time.

  • When asked, she said her erratic behavior was due to stress.

    Fiction book (1996)
  • There was more erratic rainfall and farmers were actually starting to lose their yields because of this.

  • Esther's behavior has been so erratic since she got back.

  • The demand for the oily scrap steel was erratic, and costs were passed on to the generators.

    Academic text (1998)
  • Friendships for both women were scant and somewhat erratic due to location and lifestyle.

    Academic text (1995)
  • The ethnic conflicts and the possibility of erratic politics in Eastern Europe are reminiscent of the interwar period.

    Academic text (1991)
  • The stock market has been erratic this month, with prices fluctuating wildly every day.

Synonyms

random
vserratic
527 3.4

Happening without a plan and by chance

is about irregular, sudden changes often with pattern, not only pure chance
unpredictable
vserratic
163 4.4

Likely to change suddenly and hard to know in advance

emphasizes irregular patterns and sudden changes rather than mere surprise
unstable
vserratic
91 4.4

A person whose mood or behavior changes suddenly

emphasizes irregular actions in general rather than only mental unsteadiness
volatile
vserratic
77 7.0

Likely to change suddenly and become more dangerous

is about irregular behavior without necessarily implying harm or danger
uneven
vserratic
42 2.3

Not smooth or level, with parts higher and lower

is about unpredictable sudden changes rather than simply roughness or variation
fickle
vserratic
39 6.2

Changing often in a way you cannot rely on

is about sudden change in many areas, not only loyalties or feelings
sporadic
vserratic
35 7.0

Happening sometimes and in different places

is about sudden or frequent shifts rather than rare, isolated occurrences
intermittent
vserratic
35 6.5

Happening sometimes but not all the time

draws attention to sudden behavior changes rather than periods of pause
turbulent
vserratic
34 6.6

Full of confusion and disorder among people, politics, or events

focuses on sudden individual changes rather than overall disorder or unrest
irregular
vserratic
27 3.5

Happening at no fixed times

highlights sudden, often sharp changes rather than only lacking pattern
temperamental
vserratic
12 6.5

Tends to change mood suddenly and act in an unexpected way

applies to irregular actions broadly, not limited to mood changes
chaotic
vserratic
  • Specialized
9 7.2

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

highlights sudden irregular acts rather than systemic unpredictability from complexity
mercurial
vserratic
7 8.2

Changing mood or behaviour suddenly and without warning

describes unpredictable behavior across situations, not only mood swings
flaky
vserratic
  • Informal
6 7.0

Tending to fail or change without warning

refers to irregular behavior in itself rather than unreliability or failure
stochastic
vserratic
  • Specialized
4 9.9

Having events or results that happen by chance you cannot predict

focuses on abrupt changes in behavior rather than formal statistical randomness
inconstant
vserratic
2 7.5

Changing often and not staying the same

refers more broadly to irregular actions, not only unreliability over time
unsettled
vserratic
2 4.3

Weather that often changes, bringing rain or strong wind

points to sudden, unpredictable acts rather than generally unstable surroundings
nonlinear
vserratic
1 6.3

A story or plan that is not in time order and has no clear pattern

is about sudden irregular changes in actions rather than complex sequence shapes
shifty
vserratic
1 6.7

Something that moves and changes direction suddenly and often

is about irregular behavior in any sense, not only movement or shifts
aperiodic
vserratic
  • Specialized
8.2

Does not happen at regular times or repeat a pattern

focuses on sudden or irregular behavior rather than missing repetition
fluctuating
vserratic
6.1

Changing up and down often in a way you cannot guess

focuses on abrupt shifts rather than steady back and forth
quicksilver
vserratic
  • Archaic
8.6

Likely to change mood or behavior quickly and without warning

covers irregular changes generally rather than only very rapid mood shifts
zigzaggy
vserratic
  • Informal
6.5

Changing ideas or behavior often without a clear reason

implies irregular change generally rather than only sharp back and forth motion
indeterministic
vserratic
  • Specialized
9.2

Having no single predictable result because chance affects it

emphasizes sudden, irregular behavior rather than theoretical unpredictability
nonsystematic
vserratic
6.7

Not arranged according to a plan or regular order

describes sudden changes and inconsistency in behavior rather than mere lack of system
a bit switchy
vserratic
  • UK
9.2

Often changes mood or behavior quickly and without warning

is used for general irregular behavior, not only mild or occasional mood shifts
wandering
vserratic
3.7

Moving without a fixed direction or plan

concerns sudden, irregular behavior patterns rather than aimless movement

Antonyms

473 2.3

Not likely to change and stays steady over time

358 2.7

Able to be trusted to do what is expected

92 3.5

Gives similar results each time

How Irregular

chaotic
116 4.7
erratic
94 6.1
inconsistent
96 4.7
variable
  • Specialized
140 4.2
irregular
14 3.4

Surface Forms

erratic positive
erraticer comparative
erraticest superlative

Morphology

erratic = err (semi-transparent) = err + ic

Formed with the productive suffix '-ic' from the verb 'err', but the adjective meaning 'irregular, unpredictable' is not directly inferable from 'err' ('to make a mistake') for an average learner.

Etymology

Erratic comes from the old Latin verb errare, which means 'to wander' or 'to stray'. Think of something that 'wanders' and does not stay in one place, so erratic means 'not regular' or unpredictable.