Artificial intelligent assistant

mischievable

misˈchievable, a. Obs.
  [f. mischieve v. + -able (in an active sense).]
  Mischievous, harmful.

1680 Filmer Patriarcha iii. §7 If a King did strictly swear to observe all the Laws, he could not without Perjury give his Consent to the Repealing..of any Statute..which would be very mischievable to the State.

Oxford English Dictionary

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