Artificial intelligent assistant

backermost

ˈbackermost, a. Obs. or dial.
  [f. back a.; late formation on type of hindermost, innermost: see -most.]
  By-form of backmost.

1669 Churchw. Acc. in Archæol. XXXV. 449 (D.) In the gallery at Hampton in the backermost seat. 1699 in Phil. Trans. XXI. 287 Some of the backermost part of which [house] is an ancient Roman building.

Oxford English Dictionary

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