"cu" meaning in Gallego

{
  "categories": [
    {
      "kind": "other",
      "name": "GL:Sustantivos",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "GL:Sustantivos masculinos",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Gallego",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "roa-opt",
        "2": "cuu",
        "3": "ano",
        "leng": "gl"
      },
      "expansion": "Del galaicoportugués cuu (\"ano\")",
      "name": "etimología"
    }
  ],
  "etymology_text": "Del galaicoportugués cuu (\"ano\"), y este del latín cūlum (\"culo\")",
  "forms": [
    {
      "form": "cu",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "cus",
      "tags": [
        "plural"
      ]
    }
  ],
  "hypernyms": [
    {
      "sense_index": "3",
      "word": "fondo"
    }
  ],
  "lang": "Gallego",
  "lang_code": "gl",
  "pos": "noun",
  "pos_title": "sustantivo masculino",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "GL:Anatomía",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "GL:Términos malsonantes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "GL:Términos vulgares",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Culo, trasero."
      ],
      "id": "es-cu-gl-noun-z1Phw3iP",
      "sense_index": "1",
      "tags": [
        "vulgar"
      ],
      "topics": [
        "anatomy"
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "GL:Anatomía",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "GL:Términos malsonantes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "GL:Términos vulgares",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Ano."
      ],
      "id": "es-cu-gl-noun-mxPzeQb0",
      "sense_index": "2",
      "tags": [
        "vulgar"
      ],
      "topics": [
        "anatomy"
      ]
    },
    {
      "glosses": [
        "Fondo (de ciertas cosas)."
      ],
      "id": "es-cu-gl-noun-FBAiVs~9",
      "sense_index": "3"
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈku]"
    }
  ],
  "synonyms": [
    {
      "sense_index": "1",
      "word": "cachas"
    },
    {
      "sense_index": "1",
      "word": "censo"
    },
    {
      "sense_index": "1",
      "word": "cenzo"
    },
    {
      "sense_index": "1",
      "word": "nádegas"
    },
    {
      "sense_index": "1",
      "word": "traseiro"
    },
    {
      "sense_index": "2",
      "word": "ano"
    },
    {
      "sense_index": "2",
      "word": "censo"
    },
    {
      "sense_index": "2",
      "word": "cenzo"
    },
    {
      "sense_index": "2",
      "word": "curso"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "cu"
}

{
  "categories": [
    "GL:Sustantivos",
    "GL:Sustantivos masculinos",
    "Gallego"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "roa-opt",
        "2": "cuu",
        "3": "ano",
        "leng": "gl"
      },
      "expansion": "Del galaicoportugués cuu (\"ano\")",
      "name": "etimología"
    }
  ],
  "etymology_text": "Del galaicoportugués cuu (\"ano\"), y este del latín cūlum (\"culo\")",
  "forms": [
    {
      "form": "cu",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "cus",
      "tags": [
        "plural"
      ]
    }
  ],
  "hypernyms": [
    {
      "sense_index": "3",
      "word": "fondo"
    }
  ],
  "lang": "Gallego",
  "lang_code": "gl",
  "pos": "noun",
  "pos_title": "sustantivo masculino",
  "senses": [
    {
      "categories": [
        "GL:Anatomía",
        "GL:Términos malsonantes",
        "GL:Términos vulgares"
      ],
      "glosses": [
        "Culo, trasero."
      ],
      "sense_index": "1",
      "tags": [
        "vulgar"
      ],
      "topics": [
        "anatomy"
      ]
    },
    {
      "categories": [
        "GL:Anatomía",
        "GL:Términos malsonantes",
        "GL:Términos vulgares"
      ],
      "glosses": [
        "Ano."
      ],
      "sense_index": "2",
      "tags": [
        "vulgar"
      ],
      "topics": [
        "anatomy"
      ]
    },
    {
      "glosses": [
        "Fondo (de ciertas cosas)."
      ],
      "sense_index": "3"
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈku]"
    }
  ],
  "synonyms": [
    {
      "sense_index": "1",
      "word": "cachas"
    },
    {
      "sense_index": "1",
      "word": "censo"
    },
    {
      "sense_index": "1",
      "word": "cenzo"
    },
    {
      "sense_index": "1",
      "word": "nádegas"
    },
    {
      "sense_index": "1",
      "word": "traseiro"
    },
    {
      "sense_index": "2",
      "word": "ano"
    },
    {
      "sense_index": "2",
      "word": "censo"
    },
    {
      "sense_index": "2",
      "word": "cenzo"
    },
    {
      "sense_index": "2",
      "word": "curso"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "cu"
}