'unsupplied' originates from the prefix 'un-' meaning 'not' and the word 'supply' from Latin 'supplere', where 'sub-' meant 'under' and 'plere' meant 'to fill'.

'supplere' transformed into the Old French word 'soupleer', and eventually became the modern English word 'supply'. The prefix 'un-' was added to form 'unsupplied'.

Initially, 'supply' meant 'to fill up or complete', and 'unsupplied' evolved to mean 'not filled or provided'.