'cathart' originates from Greek, specifically the word 'katharsis,' where 'katharos' meant 'pure' or 'clean.'

'katharsis' transformed into the Latin word 'catharticus,' and eventually became the modern English word 'cathart.'

Initially, it meant 'to purify or cleanse,' but over time it evolved into its current metaphorical meaning of 'emotional release or purification.'