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efficacious
used in Hiroshima

only 1 use
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Definition
effective in producing an intended effect
  • over the years it turned out ... that that most efficacious medicine for whatever ailed him would be cash or credit, the larger the dosage the better.
    Five — The Aftermath (17% in)
efficacious = effective in producing an intended effect
There are no more uses of "efficacious" in Hiroshima.

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