Artificial intelligent assistant

fenestrelle

feneˈstrelle Obs. rare.
  [a. OF. fenestrelle, dim. of fenestre: see fenester.]
  A small window.

c 1420 Pallad. on Husb. i. 534 A toure with plaine and whited walles, And fenestrelles iiii. Ibid. 545 In every fenestrell [sic MS.; printed -tell].

Oxford English Dictionary

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