'experimentally-assembled' originates from the combination of 'experimentally' and 'assembled'. 'Experimentally' comes from 'experiment', which originates from Latin 'experimentum', meaning 'a trial, test'. 'Assembled' comes from 'assemble', which originates from Old French 'assembler', meaning 'to bring together'.

'experimentum' transformed into the Old French 'experiment', and eventually became the modern English word 'experiment'. 'Assembler' transformed into the Middle English 'assemble', and eventually became the modern English word 'assemble'.

Initially, 'experimentum' meant 'a trial, test', and 'assembler' meant 'to bring together'. Over time, these meanings evolved into their current forms, retaining the core idea of testing and constructing.