Artificial intelligent assistant

palliator

palliator
  (ˈpælɪeɪtə(r))
  [agent-n. in L. form from palliate.]
  One who palliates or alleges extenuating considerations; an extenuator.

1792 F. Burney Lett. 20 Dec., The worst..will not risk losing their only abettors and palliators in this kingdom. 1824 Examiner 435/1 He is..a palliator of every powerful and profitable abuse. 1878 Spurgeon Treas. Dav. Ps. cvi. 30 Phinehas..was no trimmer, or palliator of sin.

Oxford English Dictionary

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