Artificial intelligent assistant

nuisant

ˈnuisant, a. Obs. rare.
  In 5, 7 nusant.
  [a. OF. nuisant, pres. pple. of nuire.]
  Harmful, hurtful; of the nature of a nuisance.

c 1400 tr. Secreta Secret., Gov. Lordsh. 86 Whenne þe nusant sterres loke noght aȝeyn. Ibid., His remuynge fro nusant sterrys. 1676 Grant of Ballastage to Trinity Ho. 41 Anything that shall be prejudicial, nusant, or obnoxious, to any of our Palaces, Houses, or Buildings.

Oxford English Dictionary

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