'properly-placed' originates from the combination of 'properly' and 'placed', where 'properly' means 'in a suitable manner' and 'placed' means 'put in a particular position'.

'properly' comes from the Latin word 'proprius', meaning 'one's own', and 'placed' comes from the Old French 'placer', meaning 'to place'.

Initially, 'properly' meant 'in a manner that is one's own', but over time it evolved to mean 'in a suitable or correct manner'.