Artificial intelligent assistant

avengeful

avengeful, a.
  (əˈvɛndʒfʊl)
  [f. avenge n. + -ful.]
  Full of vengeance, vengeance-taking.

1591 Spenser Tears of Muses 8 Ioues auengefull wrath. 1649 tr. Alcoran 73 God will be avenged on him, he is omnipotent, and avengfull. 1763 Churchill Duellist i. 95 Fearing his avengeful rod. 1841 D'Israeli Amen. Lit. I. 19 His avengeful queen cast the mother..into the river.

Oxford English Dictionary

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