Learn how to say Lunacy correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word lunacy:
noun (plural lunacies)
the state of being a lunatic; insanity (not in technical use):
it has been suggested that originality demands a degree of lunacy
extreme folly or eccentricity:
such an economic policy would be sheer lunacy
mid 16th century (originally referring to insanity of an intermittent kind attributed to changes of the moon): from lunatic + -acy