Artificial intelligent assistant

impugnant

imˈpugnant, ppl. a. Obs. rare—1.
  [ad. L. impugnāns, impugnānt-em, or corresponding It. impugnante, pres. pple. of impugnāre to oppose, impugn.]
  Repugnant, opposed.

1579 Fenton Guicciard. ii. (1599) 95 Whether you ought to be the personage so impugnant and contrary to your proper resolution.

Oxford English Dictionary

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