Artificial intelligent assistant

necessaire

necessaire, a. Obs. rare.
  [a. F. nécessaire (13th c.), ad. L. necessārius.]
  Necessary.

c 1374 Chaucer Troylus iv. 1021 Al seme it not ther-by That prescience put falling necessaire To thing to come. 1390 Gower Conf. III. 135 Which is a thing full necessaire To contrepeise the balance.

Oxford English Dictionary

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