'nonmember' originates from the prefix 'non-' meaning 'not' and the word 'member', which comes from Latin 'membrum', meaning 'limb' or 'part'.

'nonmember' was formed by adding the prefix 'non-' to 'member', which evolved from the Latin word 'membrum'.

Initially, 'member' meant 'part of a body', but over time it evolved to mean 'part of a group', and 'nonmember' came to mean 'not part of a group'.