'unsourced' originates from the prefix 'un-' meaning 'not' and the word 'sourced,' which comes from the Latin word 'surgere,' meaning 'to rise.'

'sourced' evolved from the Latin word 'surgere' through Old French 'sourcer,' eventually becoming the modern English word 'source.' The prefix 'un-' was added to form 'unsourced.'

Initially, 'source' meant 'to rise or spring forth,' but over time it evolved to mean 'origin or point of supply.' The prefix 'un-' negates this meaning, indicating the absence of a source.