"thairsti" meaning in Irish

{
  "forms": [
    {
      "form": "thairistise",
      "tags": [
        "emphatic"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ga",
        "2": "prepositional pronoun",
        "3": "emphatic",
        "4": "thairistise"
      },
      "expansion": "thairsti (emphatic thairistise)",
      "name": "head"
    }
  ],
  "lang": "Irish",
  "lang_code": "ga",
  "pos": "pron",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Irish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Irish prepositional pronouns",
          "parents": [
            "Prepositional pronouns",
            "Prepositions",
            "Pronoun forms",
            "Lemmas",
            "Non-lemma forms",
            "Pronouns"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "thar"
        }
      ],
      "glosses": [
        "third-person singular feminine of thar"
      ],
      "id": "en-thairsti-ga-pron-gxbG5lqj",
      "links": [
        [
          "thar",
          "thar#Irish"
        ]
      ],
      "tags": [
        "feminine",
        "form-of",
        "singular",
        "third-person"
      ]
    }
  ],
  "word": "thairsti"
}

{
  "forms": [
    {
      "form": "thairistise",
      "tags": [
        "emphatic"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ga",
        "2": "prepositional pronoun",
        "3": "emphatic",
        "4": "thairistise"
      },
      "expansion": "thairsti (emphatic thairistise)",
      "name": "head"
    }
  ],
  "lang": "Irish",
  "lang_code": "ga",
  "pos": "pron",
  "senses": [
    {
      "categories": [
        "Irish entries with incorrect language header",
        "Irish non-lemma forms",
        "Irish prepositional pronouns",
        "Pages with 1 entry"
      ],
      "form_of": [
        {
          "word": "thar"
        }
      ],
      "glosses": [
        "third-person singular feminine of thar"
      ],
      "links": [
        [
          "thar",
          "thar#Irish"
        ]
      ],
      "tags": [
        "feminine",
        "form-of",
        "singular",
        "third-person"
      ]
    }
  ],
  "word": "thairsti"
}