His process of reasoning may be briefly stated thus: draff and dregs are refuse, they are things thrown away, sometimes (as in German dreck, sordes) they are even disgustful; and as there is no expression of contempt and disgust so strong as spitting, the sound rac transferred itself by a natural association of ideas from the act to the object of it.

dregg, Prov. draco, Ger., Du. dreck, O. F. drache, drêche, (and he might have added E. trash,)