Origin: 1640–50; orig. (now obsolete) to stupefy, make drowsy; compare Scots, N England dialect dozened,Middle English (Scots ) dosnyt, dosinnit stupefied, dazed; akin to Old Norse dūsa rest, Swedish dialect dusa doze, slumber, Middle Low German dusen to be thoughtless; compare daze
1640s, probably from a Scandinavian source (cf. Dan. dose "to make dull," Swed. dial. dusa "to sleep"); related to O.E. dysig "foolish" (see dizzy). May have existed in dialect earlier than attested date.