'solid-composed' originates from the combination of 'solid' and 'composed', where 'solid' meant 'firm or stable in structure' and 'composed' meant 'made up of'.

'solid' and 'composed' were used separately in Middle English and eventually combined to form the modern English term 'solid-composed'.

Initially, it meant 'made up of solid parts', and this meaning has largely remained the same in modern usage.