"knower" meaning in English

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      "expansion": "From know + -er.",
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  "etymology_text": "From know + -er.",
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      "form": "knowers",
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  "lang_code": "en",
  "pos": "noun",
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          "text": "The doctor is the modern master of the mythological realm, the knower of all the secret ways and words of potency.",
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          "extra": "one who knows",
          "word": "know"
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        "Agent noun of know: one who knows."
      ],
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  "word": "knower"
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  "etymology_text": "From know + -er.",
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