'adreamed' originates from Middle English, specifically the word 'adreamed,' where 'a-' was a prefix denoting 'in a state of' and 'dreamed' meant 'having dreamed.'

'adreamed' changed from the Middle English word 'adreamed' and has largely retained its form and meaning in modern English.

Initially, it meant 'in a state of dreaming,' and this meaning has largely remained the same in modern usage.