Artificial intelligent assistant

unbendable

unˈbendable, a.
  (un-1 7 b.)

[1775 Ash.] 1884 G. Macdonald tr. Lett. fr. Hell (1885) 62 In such things her will was unbendable. 1889 Baden-Powell Pigsticking 94 The neck connecting the socket to the blade should be strong and unbendable.

Oxford English Dictionary

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