"mistreater" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mistreat",
        "3": "er<id:agent noun>"
      },
      "expansion": "mistreat + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "From mistreat + -er.",
  "forms": [
    {
      "form": "mistreaters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mistreater (plural mistreaters)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -er (agent noun)",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1957, Muddy Waters (McKinley Morganfield), \"Mean Mistreater\" (lyrics to blues song)",
          "text": "She's a mean mistreater, and she don't mean me no good."
        }
      ],
      "glosses": [
        "A person who mistreats."
      ],
      "id": "en-mistreater-en-noun-2qPBaexc",
      "links": [
        [
          "mistreat",
          "mistreat"
        ]
      ]
    }
  ],
  "word": "mistreater"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mistreat",
        "3": "er<id:agent noun>"
      },
      "expansion": "mistreat + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "From mistreat + -er.",
  "forms": [
    {
      "form": "mistreaters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mistreater (plural mistreaters)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms suffixed with -er (agent noun)",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1957, Muddy Waters (McKinley Morganfield), \"Mean Mistreater\" (lyrics to blues song)",
          "text": "She's a mean mistreater, and she don't mean me no good."
        }
      ],
      "glosses": [
        "A person who mistreats."
      ],
      "links": [
        [
          "mistreat",
          "mistreat"
        ]
      ]
    }
  ],
  "word": "mistreater"
}