Artificial intelligent assistant

palacious

paˈlacious, a. Obs.
  Also pall-.
  [f. L. palāti-um palace n.1 + -ous.]
  = palatial.

1628 Dekker Brittannia's Honor Wks. 1873 IV. 99 Faire, Spacious, and Pallacious Houses. 1662 J. Graunt Bills of Mortality vi. 41 The turning of great Palacious Houses into small Tenements.

Oxford English Dictionary

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