'evidence-based' originates from the combination of 'evidence' and 'based', where 'evidence' comes from Latin 'evidentia', meaning 'obviousness', and 'based' comes from Old French 'basse', meaning 'foundation'.

'evidence' evolved from the Latin 'evidentia' through Old French 'evidence', and 'based' evolved from Old French 'basse' to the modern English 'base'.

Initially, 'evidence' meant 'obviousness', but over time it evolved to mean 'proof or support', and 'based' has retained its meaning of 'foundation'.