'randomly-gathered' originates from the combination of 'randomly' and 'gathered', where 'randomly' comes from 'random', meaning 'without definite aim, direction, rule, or method', and 'gathered' is the past participle of 'gather', meaning 'to bring together'.

'randomly-gathered' evolved from the Middle English word 'gaderen', which meant 'to collect or assemble', and 'random', which was used in the 14th century to mean 'impetuous or hasty'.

Initially, 'gather' meant 'to bring together', and 'random' meant 'impetuous'. Over time, 'randomly-gathered' evolved to mean 'collected without a specific order'.