Artificial intelligent assistant

pervigilate

perˈvigilate, v. Obs. rare—0.
  [f. ppl. stem of L. pervigilāre to remain awake, watch all night, f. per- 1 + vigilāre to watch.]

1623 Cockeram, Peruigilate, to watch.

  So pervigiˈlation Obs. [L. pervigilātio], a watching through the night, keeping of vigil.

1623 Cockeram Pervigilation, a watching. 1721 Bailey.


Oxford English Dictionary

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