'adreamt' originates from Old English, specifically the word 'drēam,' where 'drēam' meant 'joy' or 'music.'

'drēam' transformed into the Middle English word 'drem,' and eventually became the modern English word 'dream.'

Initially, it meant 'joy or music,' but over time it evolved into its current meaning of 'a series of thoughts, images, or emotions occurring during sleep.'