'randomly-modified' originates from the combination of 'randomly' and 'modified', where 'randomly' comes from 'random', meaning 'without definite aim, direction, rule, or method', and 'modified' comes from 'modify', meaning 'to change or alter'.

'randomly-modified' evolved from the combination of the words 'randomly' and 'modified', which were used separately in Middle English and later combined in modern English.

Initially, 'randomly-modified' meant 'changed in a random manner', and this meaning has largely remained the same in modern usage.