Unexpected and Inexplicable Change in a Situation

This page is the CodyCross answer for the clue below from Past and Present Tech, Group 1456, Puzzle 3 (Compact Disc).

Question is: Unexpected and Inexplicable Change in a Situation

and the answer is: VAGARY

Word Meaning:

VAGARY — An erratic, unpredictable occurrence or action.

Definitions from Wiktionary.