Artificial intelligent assistant

imprehensible

impreˈhensible, a. Obs. rare—1.
  [a. OF. imprehensible (Godefroy), ad. late L. impre(he)nsibilis, f. im- (im-2) + prehendĕre, prehens- to take, seize: cf. comprehensible.]
  Not to be grasped or seized; not to be apprehended.

1622 Babington's Comf. Notes Numb. xxix. Wks. II. 134 The imprehensible [edd. 1615, 1637 incomprehensible] sweetnesse of our blessed Sauiour.

Oxford English Dictionary

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