Artificial intelligent assistant

truehead

ˈtruehead Obs. rare.
  In 3 trewehede, (trywede), 4 trewhede, 5 trowhede.
  [f. OE. tréowe, true + -hede, -head.]
  Faithfulness, fidelity.

1297 R. Glouc. (Rolls) 7370 He wolde þat alle men iseye is trewehede [v.r. trywede]. c 1375 Cursor M. 97 (Fairf.) Of hir godenes and hir trew hede.

Oxford English Dictionary

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