'officially-built' originates from the combination of 'officially' and 'built', where 'officially' comes from 'official', meaning 'authorized by a proper authority', and 'built' is the past participle of 'build', meaning 'to construct'.

'officially' evolved from the Latin word 'officialis', and 'built' comes from the Old English 'byldan'.

Initially, 'officially' meant 'by authority', and 'built' meant 'constructed'. Together, they convey the idea of something constructed by an official authority.