'externally' originates from Latin, specifically the word 'externus,' where 'ex-' meant 'out of' and 'ternus' meant 'of or pertaining to.' 'Sourced' comes from the Latin word 'surgere,' meaning 'to rise.'

'externus' transformed into the Old French word 'externe,' and eventually became the modern English word 'external.' 'Surgere' evolved into the Old French 'sourcer,' leading to the modern English 'source.'

Initially, 'externus' meant 'outside,' and 'surgere' meant 'to rise.' Over time, 'externally-sourced' evolved to mean 'obtained from outside sources.'