"self-slayer" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "self-",
        "3": "slayer"
      },
      "expansion": "self- + slayer",
      "name": "af"
    }
  ],
  "etymology_text": "From self- + slayer.",
  "forms": [
    {
      "form": "self-slayers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "self-slayer (plural self-slayers)",
      "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 prefixed with self-",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2014, John Sym, Michael MacDonald, Lifes Preservative Against Self-Killing",
          "text": "John King made the key point: suicide was worse than other sins because it left no time for repentance, and so it was difficult to believe that many, if any, self-slayers were spared.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "One who slays oneself; self-killer."
      ],
      "id": "en-self-slayer-en-noun-s1ZRUc7G",
      "links": [
        [
          "slay",
          "slay"
        ],
        [
          "self-killer",
          "self-killer"
        ]
      ]
    }
  ],
  "word": "self-slayer"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "self-",
        "3": "slayer"
      },
      "expansion": "self- + slayer",
      "name": "af"
    }
  ],
  "etymology_text": "From self- + slayer.",
  "forms": [
    {
      "form": "self-slayers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "self-slayer (plural self-slayers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms prefixed with self-",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "2014, John Sym, Michael MacDonald, Lifes Preservative Against Self-Killing",
          "text": "John King made the key point: suicide was worse than other sins because it left no time for repentance, and so it was difficult to believe that many, if any, self-slayers were spared.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "One who slays oneself; self-killer."
      ],
      "links": [
        [
          "slay",
          "slay"
        ],
        [
          "self-killer",
          "self-killer"
        ]
      ]
    }
  ],
  "word": "self-slayer"
}