'circularly-assembled' originates from the combination of 'circularly' and 'assembled', where 'circularly' is derived from 'circle', meaning 'a round shape', and 'assembled' from 'assemble', meaning 'to put together'.

'circularly' changed from the Latin word 'circulus' meaning 'small ring', and 'assembled' from the Old French 'assembler', eventually becoming the modern English word 'assembled'.

Initially, 'circularly' meant 'in a circular manner', and 'assembled' meant 'put together', which has largely remained the same in modern usage.