catharsis
noun
the purging of the emotions or relieving of emotional tensions, especially through certain kinds of art, as tragedy or music.
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Scammony, and other strong purges, are liable to produce hypercatharsis, if they are not nicely prepared, and accurately weighed, and are thence dangerous in common practice.
From Zoonomia, Vol. II Or, the Laws of Organic Life by Erasmus Darwin