'intentionally-demonstrated' originates from the combination of 'intentionally' and 'demonstrated', where 'intentionally' comes from Latin 'intentio' meaning 'a stretching out' and 'demonstrated' from Latin 'demonstrare' meaning 'to point out'.

'intentionally-demonstrated' evolved from the combination of the words 'intentionally' and 'demonstrated' in modern English.

Initially, 'intentionally' meant 'with intention or purpose', and 'demonstrated' meant 'shown or exhibited'. The combined form retains these meanings.