"abacc" meaning in Middle Irish

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "ga",
            "2": "abhac"
          },
          "expansion": "Irish: abhac",
          "name": "desc"
        }
      ],
      "text": "Irish: abhac"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "wlm",
        "2": "afanc",
        "t": "dwarf; beaver"
      },
      "expansion": "Middle Welsh afanc (“dwarf; beaver”)",
      "name": "cog"
    },
    {
      "args": {
        "1": "mga",
        "2": "cel-pro",
        "3": "*abankos",
        "t": "beaver"
      },
      "expansion": "Proto-Celtic *abankos (“beaver”)",
      "name": "der"
    },
    {
      "args": {
        "1": "cel-pro",
        "2": "*abū",
        "t": "river"
      },
      "expansion": "*abū (“river”)",
      "name": "m"
    }
  ],
  "etymology_text": "Associated by Matasović with Middle Welsh afanc (“dwarf; beaver”), from Proto-Celtic *abankos (“beaver”), a derivative of *abū (“river”). However, the sense ‘beaver’ is unattested in Goidelic, and Proto-Celtic *nk should give Goidelic /ɡ/, not /k/.",
  "forms": [
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "mga-mutation",
      "source": "mutation",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "abacc",
      "source": "mutation",
      "tags": [
        "mutation",
        "mutation-radical"
      ]
    },
    {
      "form": "n-abacc",
      "source": "mutation",
      "tags": [
        "mutation",
        "mutation-nasal"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mga",
        "2": "noun",
        "g": "m"
      },
      "expansion": "abacc m",
      "name": "head"
    }
  ],
  "inflection_templates": [
    {
      "args": {
        "1": "a",
        "2": "bacc"
      },
      "name": "mga-mutation"
    }
  ],
  "lang": "Middle Irish",
  "lang_code": "mga",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Middle Irish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "dwarf"
      ],
      "id": "en-abacc-mga-noun-mig~0BKw",
      "links": [
        [
          "dwarf",
          "dwarf"
        ]
      ],
      "tags": [
        "masculine"
      ],
      "wikipedia": [
        "Brill Publishers"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈavək/"
    }
  ],
  "word": "abacc"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "ga",
            "2": "abhac"
          },
          "expansion": "Irish: abhac",
          "name": "desc"
        }
      ],
      "text": "Irish: abhac"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "wlm",
        "2": "afanc",
        "t": "dwarf; beaver"
      },
      "expansion": "Middle Welsh afanc (“dwarf; beaver”)",
      "name": "cog"
    },
    {
      "args": {
        "1": "mga",
        "2": "cel-pro",
        "3": "*abankos",
        "t": "beaver"
      },
      "expansion": "Proto-Celtic *abankos (“beaver”)",
      "name": "der"
    },
    {
      "args": {
        "1": "cel-pro",
        "2": "*abū",
        "t": "river"
      },
      "expansion": "*abū (“river”)",
      "name": "m"
    }
  ],
  "etymology_text": "Associated by Matasović with Middle Welsh afanc (“dwarf; beaver”), from Proto-Celtic *abankos (“beaver”), a derivative of *abū (“river”). However, the sense ‘beaver’ is unattested in Goidelic, and Proto-Celtic *nk should give Goidelic /ɡ/, not /k/.",
  "forms": [
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "mga-mutation",
      "source": "mutation",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "abacc",
      "source": "mutation",
      "tags": [
        "mutation",
        "mutation-radical"
      ]
    },
    {
      "form": "n-abacc",
      "source": "mutation",
      "tags": [
        "mutation",
        "mutation-nasal"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mga",
        "2": "noun",
        "g": "m"
      },
      "expansion": "abacc m",
      "name": "head"
    }
  ],
  "inflection_templates": [
    {
      "args": {
        "1": "a",
        "2": "bacc"
      },
      "name": "mga-mutation"
    }
  ],
  "lang": "Middle Irish",
  "lang_code": "mga",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Middle Irish entries with incorrect language header",
        "Middle Irish lemmas",
        "Middle Irish masculine nouns",
        "Middle Irish nouns",
        "Middle Irish terms derived from Proto-Celtic",
        "Middle Irish terms with IPA pronunciation"
      ],
      "glosses": [
        "dwarf"
      ],
      "links": [
        [
          "dwarf",
          "dwarf"
        ]
      ],
      "tags": [
        "masculine"
      ],
      "wikipedia": [
        "Brill Publishers"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈavək/"
    }
  ],
  "word": "abacc"
}