'consistently-modified' originates from the combination of 'consistent' and 'modify', where 'consistent' means 'unchanging in nature' and 'modify' means 'to change or alter'.

'consistently-modified' evolved from the combination of the words 'consistent' and 'modify', which have been used in English since the 16th and 17th centuries respectively.

Initially, it meant 'changed in a steady manner', and this meaning has largely remained the same in modern usage.