'preventively-assembled' originates from the combination of 'preventively' and 'assembled', where 'preventively' is derived from 'prevent', meaning 'to stop something from happening', and 'assembled' is derived from 'assemble', meaning 'to put together'.

'preventively' changed from the Latin word 'praeventus', and 'assembled' from the Old French word 'assembler', eventually becoming the modern English word 'preventively-assembled'.

Initially, 'preventively' meant 'to act in advance to stop something', and 'assembled' meant 'put together'. The combined term 'preventively-assembled' evolved to mean 'put together in advance to prevent issues'.