'morbid' originates from Latin, specifically the word 'morbidus,' where 'morbus' meant 'disease.'

'morbidus' transformed into the French word 'morbid,' and eventually became the modern English word 'morbid' through Middle English.

Initially, it meant 'related to disease,' but over time it evolved into its current meaning of 'having an unhealthy interest in disturbing subjects.'