'compulsorily-built' originates from the word 'compulsory,' which comes from Latin, specifically the word 'compulsorius,' where 'compuls-' meant 'driven together.'

'compulsorius' transformed into the Old French word 'compulsorie,' and eventually became the modern English word 'compulsory' through Middle English.

Initially, it meant 'driven together by force,' but over time it evolved into its current meaning of 'required by law or rule.'