'purposefully-released' originates from the combination of 'purposefully' and 'released', where 'purposefully' means 'with intention' and 'released' means 'set free'.

'Purposefully' and 'released' have been used separately in English since the Middle Ages, but their combination into 'purposefully-released' is a modern construct.

Initially, 'purposefully' meant 'with a purpose', and 'released' meant 'set free'. The combination retains these meanings in modern usage.