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efficacious
used in David Copperfield

only 1 use
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Definition effective in producing an intended effect
  • The design was efficacious; for I remember that my mother seemed more at ease during the rest of the evening, and that Peggotty observed her less.
    Chapters 7-9 (59% in)

There are no more uses of "efficacious" in David Copperfield.

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