'regularly-changed' originates from the combination of 'regularly' and 'changed', where 'regularly' comes from Latin 'regularis' meaning 'consistent' and 'changed' from Old French 'changier' meaning 'to alter'.

'regularly' evolved from Latin 'regularis' through Old French 'regulier', and 'changed' from Old French 'changier', eventually forming the modern English compound 'regularly-changed'.

Initially, 'regularly' meant 'in a consistent manner' and 'changed' meant 'altered', and together they describe something that is altered consistently.