Artificial intelligent assistant

cessile

cessile, a. rare.
  (ˈsɛsaɪl)
  Also 6 cessil.
  [as if ad. L. *cessilis, f. cessus (see cessible a.) + -ile.]
  Yielding (applied only to the air, in imitation of the first quot.).

a 1599 A. Hume Poems (1902) 28 Sa silent is the cessile air. Ibid. 49 The massiue earth reposis still, Suspended in the cessil eire. 1911 Quiller-Couch Brother Copas xxiii. 319 A faint tapping sound reached them, borne on ‘the cessile air’. 1922 Joyce Ulysses 416 Scintillant circumambient cessile air.

Oxford English Dictionary

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