'randomly-sectioned' originates from the combination of 'randomly' and 'sectioned', where 'randomly' is derived from 'random', meaning 'without a definite aim, direction, rule, or method', and 'sectioned' is derived from 'section', meaning 'to divide into parts'.

'randomly-sectioned' evolved from the combination of the words 'randomly' and 'sectioned', which have been used in English since the 16th and 17th centuries respectively.

Initially, 'randomly-sectioned' meant 'divided without a specific pattern', and this meaning has largely remained the same in modern usage.