Artificial intelligent assistant

unplacable

unˈplacable, a. Obs.
  (un-1 7 b, 5 b.)

1553 Bale Vocacyon 48 b, A perpetuall and vnplacable enemye. 1594 ? Greene Selimus Prologue 10 You shall behold him character in blood The image of an unplacable King. a 1619 M. Fotherby Atheom. i. xiii. §3 (1622) 141 An vnplacable hatred. 1676 Bp. N. French Vnkinde Desertor Pref., A hard-harted man, and our vnplacable enemy.

Oxford English Dictionary

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