Vagary

//vəˈɡɛɚ.i// noun

Definitions

Noun
  1. 1
    An erratic, unpredictable occurrence or action.

    "It now turns out that the Pitch Lake, like most other things, owes its appearance on the surface to no convulsion or vagary at all, but to a most slow, orderly, and respectable process of nature, by which buried vegetable matter, which would have become peat, and finally brown coal, in a temperate climate, becomes, under the hot tropic soil, asphalt and oil, continually oozing up beneath the pressure of the strata above it."

  2. 2
    an unexpected and inexplicable change in something (in a situation or a person's behavior, etc.) wordnet
  3. 3
    Something vague.

    "to speak in vagaries"

  4. 4
    An impulsive or illogical desire; a caprice or whim.

    "And then came the day when my socialism grew respectable,—still a vagary of youth, it was held, but romantically respectable."

Etymology

From Italian vagare (“wander”) and/or its source Latin vagārī (“to wander”), from Latin vagus (“wandering”). Later apparently reinterpreted in English as vague + -ery but without changing the spelling.

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