'defectively-produced' originates from the combination of 'defective' and 'produce', where 'defective' comes from Latin 'defectivus', meaning 'imperfect or failing'.

'defectivus' transformed into the Old French word 'defectif', and eventually became the modern English word 'defective'.

Initially, 'defective' meant 'lacking or failing', but over time it evolved to mean 'having a fault or flaw'.