Artificial intelligent assistant

rentrant

ˈrentrant, a. Obs. rare—1.
  [a. F. rentrant, pres. pple. of rentrer: see re-enter and re-entrant.]
  Re-entering.

1791 T. Newte Tour Eng. & Scot. 418 The land..forming..three salient, and two great rentrant, or returning angles.

Oxford English Dictionary

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