Artificial intelligent assistant

cover-fire

ˈcover-fire Obs.
  [f. cover v.1 + fire n., after F. couvre-feu.]
  A utensil for covering up and preserving fire.

1715 Desaguliers Fires Impr. 54 The Cover-Fire (as the Author calls it). Ibid. 129 The Cover-Fire Instruments. 1837 Penny Cycl. VIII. 234/1 An iron implement which is called a curfew, or cover-fire.

Oxford English Dictionary

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