"sfx" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "?"
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      "expansion": "sfx",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "suffix"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
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          "kind": "other",
          "name": "Pages with 1 entry",
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          "source": "w"
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          "source": "w"
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      ],
      "glosses": [
        "Abbreviation of suffix."
      ],
      "id": "en-sfx-en-noun-EnM70Q62",
      "links": [
        [
          "suffix",
          "suffix#English"
        ]
      ],
      "related": [
        {
          "word": "pfx"
        }
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "sfx"
}

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "sfx",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "pfx"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "word": "suffix"
        }
      ],
      "categories": [
        "English abbreviations",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "English words without vowels",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "Abbreviation of suffix."
      ],
      "links": [
        [
          "suffix",
          "suffix#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "sfx"
}