Artificial intelligent assistant

regredient

reˈgredient Obs. rare—1.
  [ad. L. regredient-em, pres. pple. of regredī to regrede.]
  One who retires.

1612 W. Parkes Curtaine Dr. (1876) 23 A thousand times more might the pen of his direction discouer, who is the vniversal ingredient and regredient, and Curtaine-drawer of the whole World.

Oxford English Dictionary

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