Artificial intelligent assistant

unplumbed

unˈplumbed, ppl. a.
  [un-1 8.]
  Unsounded, unfathomed.

1623 W. C[rashaw] Fatal Vesper B 4 b, The height whereof mans vnderstanding cannot aspire vnto, nor the vnplummeld [sic] depth thereof sinke vnto. c 1852 M. Arnold Isolation iv, The unplumb'd, salt, estranging sea. 1892 Stevenson Across the Plains 216 Justice is not done to..the unplumbed childishness of man's imagination.

Oxford English Dictionary

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