'digression' originates from Latin, specifically the word 'digressio,' where 'di-' meant 'apart' and 'gradi' meant 'to step.'

'digressio' transformed into the French word 'digression,' and eventually became the modern English word 'digression' through Middle English.

Initially, it meant 'to step apart from the main path,' but over time it evolved into its current meaning of 'a temporary departure from the main subject.'