English

adream

From a- + dream.

Formed from a- + dream

Proto-Indo-European *uds- ‘up, out’

Proto-Germanic *uz- ‘out-’

Proto-West Germanic *uʀ- ‘up, out, over’

English a-

Proto-Indo-European *dʰrewgʰ- ‘to deceive’

…

Proto-Germanic *draumaz ‘dream’

Proto-West Germanic *draum

Old English drēam ‘joy; music’

Middle English dream

English dream

Today it means

adj dreaming; in dreams

Language periods are conventional ranges, not dates for this word.