DictionaryvagaryUnpredictable change
noun

vagary

VAY-guh-ree/vˈeɪɡɝi/

An unpredictable change in behavior or circumstances.

A sudden vagary of the weather interrupts the sunny picnic with rain.

A bright picnic suddenly interrupted by one unexpected small raincloud dumping rain while surrounding landscape stays sunny; startled picnickers look up, unpredictable weather change.
Etymology

From “to wander,” vagary first meant a roaming journey or departure from usual conduct. Mental wandering supplied the bridge to an eccentric idea and, more broadly, an unpredictable departure from the expected.

In context

Libranima390:31
your back. Pasamonte, who was anything but meek being by this time thoroughly convinced that Don Quixote was not quite right in his head as he had committed such a vagary as to set them free),
Don Quixote - Cervantes (Illustrated Audiobook) Part 1 of 4

More examples

  • A vagary of the market wipes out their expected profit.
  • We keep extra supplies to cope with the vagaries of shipping.
  • She learns to handle the vagaries of her boss's moods.

Forms

vagary · vagaries

Similar words

fluctuation
Emphasizes variation in level or amount, not necessarily unpredictability.
caprice
Usually describes a sudden personal whim rather than changing circumstances.
vicissitude
Emphasizes changing fortunes in life, especially unwelcome changes.