Artificial intelligent assistant

unfructful

unˈfructful
  obs. var. unfruitful a.

1549 Coverdale, etc. Erasm. Par. Eph. v. 11 b, To doe fruictefull honeste offices of godlines,..and from henceforth be ashamed to haue adoe with the vnfructefull workes of darkenesse.

Oxford English Dictionary

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