Artificial intelligent assistant

perdiligent

perˈdiligent, a. Obs. rare—1.
  [ad. L. perdīligent-em: see per-1 4.]
  Very diligent. Hence perˈdiligence, thorough diligence.

1694 Motteux Rabelais v. xxiii. 105 Your..Industry internected with perdiligent Sedulity, and sedulous Perdiligence.

Oxford English Dictionary

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