"míanach" meaning in Middle Irish

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "ga",
            "2": "mianach",
            "t": "ore; mine; stuff, material, substance, quality"
          },
          "expansion": "Irish: mianach (“ore; mine; stuff, material, substance, quality”)",
          "name": "desc"
        }
      ],
      "text": "Irish: mianach (“ore; mine; stuff, material, substance, quality”)"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "mga",
        "2": "mían",
        "3": "-ach",
        "gloss1": "mineral, ore",
        "pos": "noun"
      },
      "expansion": "mían (“mineral, ore”) + -ach",
      "name": "affix"
    }
  ],
  "etymology_text": "From mían (“mineral, ore”) + -ach.",
  "forms": [
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "míanach",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mga",
        "2": "noun",
        "g": "m"
      },
      "expansion": "míanach m",
      "name": "head"
    }
  ],
  "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"
        },
        {
          "kind": "other",
          "name": "Middle Irish nouns suffixed with -ach",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "mga",
          "name": "Mining",
          "orig": "mga:Mining",
          "parents": [
            "Industries",
            "Business",
            "Economics",
            "Society",
            "Social sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "english": "breaks ore",
          "word": "míanaigid"
        }
      ],
      "glosses": [
        "vein of ore, mine"
      ],
      "id": "en-míanach-mga-noun-Y29C2JNr",
      "links": [
        [
          "mining",
          "mining#Noun"
        ],
        [
          "vein",
          "vein"
        ],
        [
          "ore",
          "ore"
        ],
        [
          "mine",
          "mine"
        ]
      ],
      "raw_glosses": [
        "(mining) vein of ore, mine"
      ],
      "tags": [
        "masculine"
      ],
      "topics": [
        "business",
        "mining"
      ]
    }
  ],
  "word": "míanach"
}

{
  "derived": [
    {
      "english": "breaks ore",
      "word": "míanaigid"
    }
  ],
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "ga",
            "2": "mianach",
            "t": "ore; mine; stuff, material, substance, quality"
          },
          "expansion": "Irish: mianach (“ore; mine; stuff, material, substance, quality”)",
          "name": "desc"
        }
      ],
      "text": "Irish: mianach (“ore; mine; stuff, material, substance, quality”)"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "mga",
        "2": "mían",
        "3": "-ach",
        "gloss1": "mineral, ore",
        "pos": "noun"
      },
      "expansion": "mían (“mineral, ore”) + -ach",
      "name": "affix"
    }
  ],
  "etymology_text": "From mían (“mineral, ore”) + -ach.",
  "forms": [
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "míanach",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mga",
        "2": "noun",
        "g": "m"
      },
      "expansion": "míanach m",
      "name": "head"
    }
  ],
  "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 nouns suffixed with -ach",
        "Pages with 2 entries",
        "Pages with entries",
        "mga:Mining"
      ],
      "glosses": [
        "vein of ore, mine"
      ],
      "links": [
        [
          "mining",
          "mining#Noun"
        ],
        [
          "vein",
          "vein"
        ],
        [
          "ore",
          "ore"
        ],
        [
          "mine",
          "mine"
        ]
      ],
      "raw_glosses": [
        "(mining) vein of ore, mine"
      ],
      "tags": [
        "masculine"
      ],
      "topics": [
        "business",
        "mining"
      ]
    }
  ],
  "word": "míanach"
}

{
  "called_from": "inflection/865",
  "msg": "inflection table: IF WITHOUT ELSE EVALS False: míanach/Middle Irish 'radical' base_tags=set()",
  "path": [
    "míanach"
  ],
  "section": "Middle Irish",
  "subsection": "noun",
  "title": "míanach",
  "trace": ""
}

{
  "called_from": "inflection/735",
  "msg": "inflection table: unrecognized header: 'lenition'",
  "path": [
    "míanach"
  ],
  "section": "Middle Irish",
  "subsection": "noun",
  "title": "míanach",
  "trace": ""
}

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