"r's" meaning in English

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  "lang_code": "en",
  "pos": "noun",
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      "examples": [
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          "ref": "1895, Robert W. Chambers, “The Yellow Sign”, in The King in Yellow, page 107:",
          "text": "[…] my nerves were shattered by a blatant exhorter, […] who insisted on his r’s with a nasal persistence which revolted my every instinct. […] I believe the minister was a good man, but when he bellowed: “And the Lorrrd said unto Moses, the Lorrrd is a man of war; the Lorrrd is his name. My wrath shall wax hot and I will kill you with the sworrrd!”. I wondered how many centuries of purgatory it would take to atone for such a sin.",
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          "word": "R's"
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  "word": "r's"
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  "lang_code": "en",
  "pos": "noun",
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    {
      "word": "R's"
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          "ref": "1895, Robert W. Chambers, “The Yellow Sign”, in The King in Yellow, page 107:",
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