'unintentionally-changed' originates from the combination of 'unintentionally' and 'changed'. 'Unintentionally' comes from the prefix 'un-' meaning 'not', and 'intentionally' from Latin 'intentio', meaning 'stretching' or 'purpose'. 'Changed' comes from Old French 'changier', meaning 'to alter'.

'Unintentionally' evolved from Middle English 'unintencionel', and 'changed' from Old French 'changier', eventually forming the modern English term 'unintentionally-changed'.

Initially, 'unintentionally' meant 'without intention', and 'changed' meant 'altered'. The combined term retains the meaning of being altered without intent.