"-aco" meaning in Spanish

{
  "etymology_number": 1,
  "forms": [
    {
      "form": "-aca",
      "head_nr": 1,
      "tags": [
        "feminine"
      ]
    },
    {
      "form": "-acos",
      "head_nr": 1,
      "tags": [
        "masculine",
        "plural"
      ]
    },
    {
      "form": "-acas",
      "head_nr": 1,
      "tags": [
        "feminine",
        "plural"
      ]
    },
    {
      "form": "-acos",
      "head_nr": 2,
      "tags": [
        "plural"
      ]
    },
    {
      "form": "-aca",
      "head_nr": 2,
      "tags": [
        "feminine"
      ]
    },
    {
      "form": "-acas",
      "head_nr": 2,
      "tags": [
        "feminine",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "-aco (adjective-forming suffix, feminine -aca, masculine plural -acos, feminine plural -acas)",
      "name": "es-adj"
    },
    {
      "args": {
        "1": "m",
        "f": "+"
      },
      "expansion": "-aco m (noun-forming suffix, plural -acos, feminine -aca, feminine plural -acas)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "_dis": "61 39",
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "Austria + -aco → austriaco (“Austrian”)"
        }
      ],
      "glosses": [
        "a suffix to make nationalities and demonyms"
      ],
      "head_nr": 2,
      "id": "en--aco-es-suffix-GDPsMGI1",
      "tags": [
        "masculine",
        "morpheme"
      ]
    }
  ],
  "word": "-aco"
}

{
  "etymology_number": 2,
  "forms": [
    {
      "form": "-acos",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "-aco m (noun-forming suffix, plural -acos)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "suffix",
  "senses": [
    {
      "examples": [
        {
          "text": "libro (“book”) + -aco → libraco (“worthless/throwaway book”)"
        }
      ],
      "glosses": [
        "a pejorative suffix"
      ],
      "id": "en--aco-es-suffix-I-fyBpOy",
      "links": [
        [
          "pejorative",
          "pejorative#English"
        ]
      ],
      "related": [
        {
          "word": "-arraco"
        }
      ],
      "tags": [
        "masculine",
        "morpheme"
      ]
    }
  ],
  "word": "-aco"
}

{
  "categories": [
    "Spanish adjective-forming suffixes",
    "Spanish countable suffixes",
    "Spanish entries with incorrect language header",
    "Spanish lemmas",
    "Spanish masculine suffixes",
    "Spanish noun-forming suffixes",
    "Spanish pejorative suffixes",
    "Spanish suffixes"
  ],
  "etymology_number": 1,
  "forms": [
    {
      "form": "-aca",
      "head_nr": 1,
      "tags": [
        "feminine"
      ]
    },
    {
      "form": "-acos",
      "head_nr": 1,
      "tags": [
        "masculine",
        "plural"
      ]
    },
    {
      "form": "-acas",
      "head_nr": 1,
      "tags": [
        "feminine",
        "plural"
      ]
    },
    {
      "form": "-acos",
      "head_nr": 2,
      "tags": [
        "plural"
      ]
    },
    {
      "form": "-aca",
      "head_nr": 2,
      "tags": [
        "feminine"
      ]
    },
    {
      "form": "-acas",
      "head_nr": 2,
      "tags": [
        "feminine",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "-aco (adjective-forming suffix, feminine -aca, masculine plural -acos, feminine plural -acas)",
      "name": "es-adj"
    },
    {
      "args": {
        "1": "m",
        "f": "+"
      },
      "expansion": "-aco m (noun-forming suffix, plural -acos, feminine -aca, feminine plural -acas)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "suffix",
  "senses": [
    {
      "examples": [
        {
          "text": "Austria + -aco → austriaco (“Austrian”)"
        }
      ],
      "glosses": [
        "a suffix to make nationalities and demonyms"
      ],
      "head_nr": 2,
      "tags": [
        "masculine",
        "morpheme"
      ]
    }
  ],
  "word": "-aco"
}

{
  "categories": [
    "Spanish countable suffixes",
    "Spanish entries with incorrect language header",
    "Spanish lemmas",
    "Spanish masculine suffixes",
    "Spanish noun-forming suffixes",
    "Spanish pejorative suffixes",
    "Spanish suffixes"
  ],
  "etymology_number": 2,
  "forms": [
    {
      "form": "-acos",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "-aco m (noun-forming suffix, plural -acos)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "suffix",
  "related": [
    {
      "word": "-arraco"
    }
  ],
  "senses": [
    {
      "examples": [
        {
          "text": "libro (“book”) + -aco → libraco (“worthless/throwaway book”)"
        }
      ],
      "glosses": [
        "a pejorative suffix"
      ],
      "links": [
        [
          "pejorative",
          "pejorative#English"
        ]
      ],
      "tags": [
        "masculine",
        "morpheme"
      ]
    }
  ],
  "word": "-aco"
}