'modernly-developed' originates from the combination of 'modernly' and 'developed', where 'modernly' is derived from 'modern', meaning 'of the present or recent times', and 'developed' from 'develop', meaning 'to grow or cause to grow and become more mature, advanced, or elaborate'.

'modernly' changed from the Old French word 'moderne', and 'developed' from the Old French 'desveloper', eventually becoming the modern English word 'modernly-developed'.

Initially, 'modernly' meant 'in a modern way', and 'developed' meant 'to unfold or unroll', but over time it evolved into its current meaning of 'characterized by modern development'.