"Érennach" meaning in Middle Irish

{
  "descendants": [
    {
      "lang": "Irish",
      "lang_code": "ga",
      "word": "Éireannach"
    },
    {
      "lang": "Manx",
      "lang_code": "gv",
      "word": "Yernagh"
    },
    {
      "lang": "Scottish Gaelic",
      "lang_code": "gd",
      "word": "Èireannach"
    }
  ],
  "etymology_links": [
    [
      "Ériu",
      "Ériu#Middle_Irish"
    ],
    [
      "-ach",
      "-ach#Middle_Irish"
    ]
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "mga",
        "2": "Ériu",
        "3": "-ach",
        "pos": "adjective"
      },
      "expansion": "Ériu + -ach",
      "name": "af"
    }
  ],
  "etymology_text": "From Ériu + -ach.",
  "forms": [
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "Érennach",
      "source": "mutation",
      "tags": [
        "mutation",
        "mutation-radical"
      ]
    },
    {
      "form": "pronounced with /h/ in h-prothesis environments",
      "source": "mutation",
      "tags": [
        "mutation",
        "mutation-radical"
      ]
    },
    {
      "form": "nÉrennach",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form",
        "mutation"
      ]
    }
  ],
  "lang": "Middle Irish",
  "lang_code": "mga",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "_dis": "67 33",
          "kind": "other",
          "name": "Middle Irish adjectives suffixed with -ach",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "68 32",
          "kind": "other",
          "name": "Middle Irish entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "71 29",
          "kind": "other",
          "name": "Middle Irish nouns suffixed with -ach",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "75 25",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "92 8",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "96 4",
          "kind": "other",
          "langcode": "mga",
          "name": "Nationalities",
          "orig": "mga:Nationalities",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Irish"
      ],
      "id": "en-Érennach-mga-adj-1lgZ5D5V",
      "links": [
        [
          "Irish",
          "Irish"
        ]
      ]
    },
    {
      "categories": [],
      "glosses": [
        "Irish person"
      ],
      "id": "en-Érennach-mga-adj-a5QDOyzc",
      "raw_glosses": [
        "(nominalized, masculine) Irish person"
      ],
      "tags": [
        "masculine",
        "noun-from-verb"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈeːɾʲən̪əx/"
    },
    {
      "ipa": "/ˈeːɾʲən̪ax/"
    }
  ],
  "word": "Érennach"
}

{
  "categories": [
    "Middle Irish adjectives",
    "Middle Irish adjectives suffixed with -ach",
    "Middle Irish entries with incorrect language header",
    "Middle Irish lemmas",
    "Middle Irish nouns suffixed with -ach",
    "Pages with 1 entry",
    "Pages with entries",
    "mga:Nationalities"
  ],
  "descendants": [
    {
      "lang": "Irish",
      "lang_code": "ga",
      "word": "Éireannach"
    },
    {
      "lang": "Manx",
      "lang_code": "gv",
      "word": "Yernagh"
    },
    {
      "lang": "Scottish Gaelic",
      "lang_code": "gd",
      "word": "Èireannach"
    }
  ],
  "etymology_links": [
    [
      "Ériu",
      "Ériu#Middle_Irish"
    ],
    [
      "-ach",
      "-ach#Middle_Irish"
    ]
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "mga",
        "2": "Ériu",
        "3": "-ach",
        "pos": "adjective"
      },
      "expansion": "Ériu + -ach",
      "name": "af"
    }
  ],
  "etymology_text": "From Ériu + -ach.",
  "forms": [
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "Érennach",
      "source": "mutation",
      "tags": [
        "mutation",
        "mutation-radical"
      ]
    },
    {
      "form": "pronounced with /h/ in h-prothesis environments",
      "source": "mutation",
      "tags": [
        "mutation",
        "mutation-radical"
      ]
    },
    {
      "form": "nÉrennach",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form",
        "mutation"
      ]
    }
  ],
  "lang": "Middle Irish",
  "lang_code": "mga",
  "pos": "adj",
  "senses": [
    {
      "glosses": [
        "Irish"
      ],
      "links": [
        [
          "Irish",
          "Irish"
        ]
      ]
    },
    {
      "categories": [
        "Middle Irish nominalized adjectives"
      ],
      "glosses": [
        "Irish person"
      ],
      "raw_glosses": [
        "(nominalized, masculine) Irish person"
      ],
      "tags": [
        "masculine",
        "noun-from-verb"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈeːɾʲən̪əx/"
    },
    {
      "ipa": "/ˈeːɾʲən̪ax/"
    }
  ],
  "word": "Érennach"
}

{
  "called_from": "inflection/735",
  "msg": "inflection table: unrecognized header: 'nasalization'",
  "path": [
    "Érennach"
  ],
  "section": "Middle Irish",
  "subsection": "adjective",
  "title": "Érennach",
  "trace": ""
}