Artificial intelligent assistant

ephemerous

ephemerous, a.
  (ɪˈfɛmərəs)
  [f. ephemer-on + -ous.]
  Having the nature of, or resembling, an ephemeron; transitory.

a 1660 Hammond 19 Serm. vi. Wks. 1684 IV, Our ephemerous wishes, that no man can distinguish from true piety, but by their sudden death. 1790 Burke Fr. Rev. 282 The ephemerous tale that does its business and dies in a day. 1872 Darwin Orig. Spec. xiv. 386 A certain ephemerous insect during its development, moults..above twenty times.

Oxford English Dictionary

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