rackly--prophetes.ai

† ˈrackly, adv. Sc. Obs. rare^—1.
  In 6 raklie.
  [? f. rackle a. + -ly².]
  Rapidly, impetuously.

c 1470 Henryson Mor. Fab. xi. (Wolf & Sheep) xix, Went never hound mair haistelie fra the hand, Quhen he wes rynnand maist raklie at the ra.

Oxford English Dictionary