'randomly-sent' originates from the combination of 'randomly' and 'sent', where 'randomly' is derived from 'random', meaning 'lacking a definite plan, purpose, or pattern', and 'sent' is the past participle of 'send', meaning 'to cause to go or be taken to a particular destination'.

'randomly' evolved from the Middle English 'randoun', meaning 'impetuous course', and 'sent' from the Old English 'sendan', meaning 'to send'.

Initially, 'randomly' meant 'impetuous course', but over time it evolved to mean 'lacking a definite plan, purpose, or pattern'.