Artificial intelligent assistant

retroflected

retroˈflected, a.
  [f. retro- + flected a.]
  Bent, directed, or turned backward.

1812 Edin. Rev. XX. 84 The words ‘retroflected divergence’ are therefore purely ornamental. 1853 G. Johnston Nat. Hist. E. Bord. I. 126 The spines on their margins..are all retroflected.

Oxford English Dictionary

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