Artificial intelligent assistant

fidelious

fiˈdelious, a. Obs.
  [f. L. fidēli-s + -ous.]
  Faithful.

1650 S. Sheppard Candido 14, I..have found thee cordially fidelious. 1655 Marrow of Complements 114 Your fidelious servitour. 1656 S. Holland Zara (1719) 16 The Champion and his fidelious. Land-loper Soto.

Oxford English Dictionary

yu7NTAkq2jTfdvEzudIdQgChiKuccveC 21a9ffada601766e4271d6d0b5c55ba4