Artificial intelligent assistant

warderere

warderere, int. Obs. rare.
  [a. AF. *ware derere (ware = mod.F. gare, look out; derere = mod.F. derrière behind).]
  ? Look out behind!

c 1386 Chaucer Reeve's T. 181 Thise sely clerkes rennen vp and doun With keepe, keepe, stand, stand, Iossa, warderere [v.rr. ware þe rere, ware derere].

Oxford English Dictionary

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