Artificial intelligent assistant

uncontaminated

unconˈtaminated, ppl. a.
  (un-1 8 and 5 b.)

1611 Cotgr., Incontaminé, vncontaminated, vnpolluted. 1774 Goldsm. Nat. Hist. II. xvi. 375 Nature has providently stopped the fruitfulness of these ill-formed productions, in order to preserve the form of every animal uncontaminated. 1832 Miss Mitford Village Ser. v. 7 Our village, though in the centre of the insurgents, continued uncontaminated. 1879 Froude Cæsar ii. 19 Whose minds were still uncontaminated, in whom the ancient habits of life still survived.

Oxford English Dictionary

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