mania -
Violent derangement of mind; madness; insanity.
mania -
Excessive or unreasonable desire; insane passion affecting one or many people; fanaticism.
Wikipedia
Mania, the presence of which is a criterion for certain psychiatric diagnoses, is a state of abnormally elevated or irritable mood, arousal, and/ or energy levels. In someways it is the opposite of depression. The word derives from the Greek "μανία" (mania), "madness, frenzy" and that from the verb "μαίνομαι" (mainomai), "to be mad, to rage, to be furious".