Artificial intelligent assistant

successanean

succeˈssanean, a. Obs. rare—1.
  [f. L. success-, pa. ppl. stem of succēdĕre to succeed, ? after succēdāneus succedaneous.]
  Marked by succession or transition.

1635 D. Person Varieties i. viii. 28 Things of a fluid and successanean nature, such as time is.

Oxford English Dictionary

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