'descendingly' originates from the Latin word 'descendere,' where 'de-' meant 'down' and 'scandere' meant 'to climb.'

'descendere' transformed into the Old French word 'descendre,' and eventually became the modern English word 'descend' through Middle English.

Initially, it meant 'to climb down,' but over time it evolved into its current meaning of 'moving downward or decreasing in order.'