vagary

An unpredictable development or change of circumstances.

An extravagant or erratic notion or action.

To gad; range.

A wandering or strolling.

A wandering of the thoughts; a wild freak; a whim; a whimsical purpose.

A wandering or strolling.

Hence, a wandering of the thoughts; a wild or fanciful freak; a whim; a whimsical purpose.

An erratic notion or action.

An impulsive or illogical desire; a caprice.

an unexpected and inexplicable change in something (in a situation or a person’s behavior, etc.)