Artificial intelligent assistant

faiterous

ˈfaiterous, a. Obs. rare.
  [f. faiter, faitour + -ous.]
  Characterized by deceit; treacherous.

1600 Holland Livy iii. xviii. 100 Faiterous and secret mischeefe was underhand practised by the Tribunes. Ibid. 959 Peevish folly first and faiterous falshood afterwards.

Oxford English Dictionary

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