'expectedly-assembled' originates from the combination of 'expectedly' and 'assembled', where 'expectedly' is derived from the Latin 'expectare', meaning 'to look out for', and 'assembled' from the Latin 'assemblare', meaning 'to bring together'.

'expectedly' changed from the Old French word 'expecter' and 'assembled' from the Old French 'assembler', eventually forming the modern English compound 'expectedly-assembled'.

Initially, 'expectedly' meant 'in a manner that was anticipated', and 'assembled' meant 'put together'. The compound retains these meanings in modern usage.