'nonconductor' originates from the prefix 'non-' meaning 'not' and the word 'conductor' from Latin 'conducere' meaning 'to lead together'.

'conducere' transformed into the English word 'conductor', and with the addition of 'non-', it became 'nonconductor'.

Initially, 'conductor' meant 'one who leads', but in modern usage, 'nonconductor' refers to materials that do not allow the flow of electricity or heat.