'regularly-shipped' originates from the combination of 'regularly' and 'shipped', where 'regularly' means 'at regular intervals' and 'shipped' means 'sent or transported'.

'Regularly' comes from the Latin word 'regularis', and 'shipped' comes from the Old English 'scipian'.

Initially, 'regularly' meant 'in a straight line', but over time it evolved to mean 'at regular intervals'. 'Shipped' has largely retained its original meaning of 'sent or transported'.