'sojourn' originates from Old French, specifically the word 'sojorner,' where 'so-' meant 'under' and 'jorner' meant 'to stay for a day.'

'sojorner' transformed into the Middle English word 'sojournen,' and eventually became the modern English word 'sojourn'.

Initially, it meant 'to stay for a day,' but over time it evolved into its current meaning of 'a temporary stay.'