Madness, Insanity
noun, の adjective
Lunatic energy is madness and insanity.
きょうき
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
その申し出を断るなんて狂気の沙汰だよ。
You must be insane to decline that offer.