'progressively-changed' originates from the combination of 'progressive' and 'changed'. 'Progressive' comes from Latin 'progressivus', meaning 'moving forward', and 'changed' is the past participle of 'change', from Old French 'changier', meaning 'to alter'.

'Progressive' evolved from the Latin 'progressivus' through Old French 'progressif', while 'changed' evolved from Old French 'changier'. The combination of these words into 'progressively-changed' is a modern English construct.

Initially, 'progressive' meant 'moving forward', and 'changed' meant 'altered'. Together, they describe a gradual alteration process.