"-x" meaning in Spanish

{
  "forms": [
    {
      "form": "-xs",
      "head_nr": 1,
      "tags": [
        "plural"
      ]
    },
    {
      "form": "-xs",
      "head_nr": 2,
      "tags": [
        "feminine",
        "masculine",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mfbysense"
      },
      "expansion": "-x m or f by sense (noun-forming suffix, plural -xs)",
      "name": "es-noun"
    },
    {
      "args": {
        "f": "#",
        "pl": "-xs"
      },
      "expansion": "-x m or f (adjective-forming suffix, masculine and feminine plural -xs)",
      "name": "es-adj"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 5 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish masculine and feminine suffixes by sense",
          "parents": [
            "Masculine and feminine suffixes by sense",
            "Suffixes by gender",
            "Suffixes",
            "Morphemes",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish neologisms",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish suffixes with multiple genders",
          "parents": [
            "Suffixes with multiple genders",
            "Suffixes by gender",
            "Suffixes",
            "Morphemes",
            "Lemmas"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "a gender-neutral suffix that replaces -o and -a in nouns, adjectives and pronouns"
      ],
      "head_nr": 2,
      "id": "en--x-es-suffix-es:gender_neutral",
      "links": [
        [
          "-o",
          "-o#Spanish"
        ],
        [
          "-a",
          "-a#Spanish"
        ]
      ],
      "raw_glosses": [
        "(nonstandard, neologism) a gender-neutral suffix that replaces -o and -a in nouns, adjectives and pronouns"
      ],
      "senseid": [
        "es:gender-neutral"
      ],
      "tags": [
        "by-personal-gender",
        "feminine",
        "masculine",
        "morpheme",
        "neologism",
        "nonstandard"
      ]
    }
  ],
  "word": "-x"
}

{
  "forms": [
    {
      "form": "-xs",
      "head_nr": 1,
      "tags": [
        "plural"
      ]
    },
    {
      "form": "-xs",
      "head_nr": 2,
      "tags": [
        "feminine",
        "masculine",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mfbysense"
      },
      "expansion": "-x m or f by sense (noun-forming suffix, plural -xs)",
      "name": "es-noun"
    },
    {
      "args": {
        "f": "#",
        "pl": "-xs"
      },
      "expansion": "-x m or f (adjective-forming suffix, masculine and feminine plural -xs)",
      "name": "es-adj"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Pages with 5 entries",
        "Pages with entries",
        "Spanish adjective-forming suffixes",
        "Spanish countable suffixes",
        "Spanish entries with incorrect language header",
        "Spanish epicene suffixes",
        "Spanish feminine suffixes",
        "Spanish gender-neutral suffixes",
        "Spanish lemmas",
        "Spanish masculine and feminine suffixes by sense",
        "Spanish masculine suffixes",
        "Spanish neologisms",
        "Spanish nonstandard terms",
        "Spanish noun-forming suffixes",
        "Spanish suffixes",
        "Spanish suffixes with multiple genders",
        "Spanish suffixes with red links in their headword lines"
      ],
      "glosses": [
        "a gender-neutral suffix that replaces -o and -a in nouns, adjectives and pronouns"
      ],
      "head_nr": 2,
      "links": [
        [
          "-o",
          "-o#Spanish"
        ],
        [
          "-a",
          "-a#Spanish"
        ]
      ],
      "raw_glosses": [
        "(nonstandard, neologism) a gender-neutral suffix that replaces -o and -a in nouns, adjectives and pronouns"
      ],
      "senseid": [
        "es:gender-neutral"
      ],
      "tags": [
        "by-personal-gender",
        "feminine",
        "masculine",
        "morpheme",
        "neologism",
        "nonstandard"
      ]
    }
  ],
  "word": "-x"
}

{
  "called_from": "form_descriptions/1698",
  "msg": "unrecognized head form: noun-forming suffix",
  "path": [
    "-x"
  ],
  "section": "Spanish",
  "subsection": "suffix",
  "title": "-x",
  "trace": ""
}

{
  "called_from": "form_descriptions/1698",
  "msg": "unrecognized head form: adjective-forming suffix",
  "path": [
    "-x"
  ],
  "section": "Spanish",
  "subsection": "suffix",
  "title": "-x",
  "trace": ""
}