1640s, probably from a Scandinavian source (compare Old Norse dusa "to doze," Danish døse "to make dull," Swedish dialectal dusa "to sleep"); related to Old English dysig "foolish" (see dizzy). May have existed in dialect earlier than attested date. Related: Dozed; dozing. As a noun, from 1731.[doze etymology, doze origin, 英语词源]