"hiad" meaning in Irish

{
  "head_templates": [
    {
      "args": {
        "1": "ga",
        "2": "mutated pronoun"
      },
      "expansion": "hiad",
      "name": "head"
    }
  ],
  "lang": "Irish",
  "lang_code": "ga",
  "pos": "pron",
  "senses": [
    {
      "alt_of": [
        {
          "word": "iad"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Irish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Irish mutated pronouns",
          "parents": [
            "Mutated pronouns",
            "Mutated forms",
            "Pronoun forms",
            "Non-lemma forms",
            "Pronouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "h-prothesized form of iad"
      ],
      "id": "en-hiad-ga-pron-TzzxYk4f",
      "links": [
        [
          "h-prothesized",
          "h-prothesis"
        ],
        [
          "iad",
          "iad#Irish"
        ]
      ],
      "tags": [
        "alt-of",
        "prothesis-h"
      ]
    }
  ],
  "word": "hiad"
}

{
  "head_templates": [
    {
      "args": {
        "1": "ga",
        "2": "mutated pronoun"
      },
      "expansion": "hiad",
      "name": "head"
    }
  ],
  "lang": "Irish",
  "lang_code": "ga",
  "pos": "pron",
  "senses": [
    {
      "alt_of": [
        {
          "word": "iad"
        }
      ],
      "categories": [
        "Irish entries with incorrect language header",
        "Irish h-prothesized forms",
        "Irish mutated pronouns",
        "Irish non-lemma forms",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "h-prothesized form of iad"
      ],
      "links": [
        [
          "h-prothesized",
          "h-prothesis"
        ],
        [
          "iad",
          "iad#Irish"
        ]
      ],
      "tags": [
        "alt-of",
        "prothesis-h"
      ]
    }
  ],
  "word": "hiad"
}