Artificial intelligent assistant

sentre

ˈsentre Her. Obs.
  [Perh. a spelling of centre n.]
  = pile n. 4.

1486 Bk. St. Albans, Her. b iv b, A Sentre in armys is called stakar of tentis [? i.e. a tent-stake]. 1486 [see sentry a.].


Oxford English Dictionary

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