Artificial intelligent assistant

sustentment

suˈstentment Obs. rare.
  [a. OF. sustentement, ad. med.L. sustentāmentum, f. sustentāre: see sustentate.]
  Sustentation, support.

c 1400 tr. Secr. Secr., Gov. Lordsh. 50 Sustentement of kynges. It most nede be of force þat ilk a kyng haue two helpes to susteyn his kyngdome.

Oxford English Dictionary

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