Artificial intelligent assistant

infidous

infidous, a. Obs. rare.
  [f. L. infīd-us + -ous; cf. infide.]
  Unfaithful; faithless.

1656 in Blount Glossogr. 1657 Tomlinson Renou's Disp. 572 Tabaxir, which his infidous Interpreter Clusius calls his Spodium.

Oxford English Dictionary

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