'unconnected' originates from the prefix 'un-' meaning 'not' and the word 'connected' from Latin 'connectere', where 'con-' meant 'together' and 'nectere' meant 'to bind'.

'connectere' transformed into the Old French word 'connecter', and eventually became the modern English word 'connect', with 'un-' added to form 'unconnected'.

Initially, it meant 'not bound together', and this meaning has largely remained the same in modern usage.