Artificial intelligent assistant

mumchanceness

ˈmumchanceness
  [f. mumchance a. + -ness.]
  Silence, reticence. Also mumchanciness.

1910 ‘A. Hope’ Second String xxi. 435 Perhaps his very mum-chanceness was his saving. Glib protestations would have smacked too strongly of the principal to commend the agent. 1920 J. Joyce Let. 29 Aug. (1966) III. 17, I am much inconvenienced by their cursed mumchanciness.

Oxford English Dictionary

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