'provisionally-built' originates from the word 'provisional,' which comes from Latin 'provisionem,' meaning 'a providing.' The suffix '-ly' indicates an adverbial form, and 'built' is the past participle of 'build,' from Old English 'byldan.'

'provisionem' transformed into the Old French 'provision,' and eventually became the modern English word 'provisional.'

Initially, 'provisional' meant 'pertaining to a provision,' but over time it evolved into its current meaning of 'temporary or interim.'