"-sa" meaning in Scottish Gaelic

{
  "etymology_templates": [
    {
      "args": {
        "1": "gd",
        "2": "sga",
        "3": "-sa",
        "pos": "1st person singular"
      },
      "expansion": "Old Irish -sa (1st person singular)",
      "name": "der"
    },
    {
      "args": {
        "1": "gd",
        "2": "sga",
        "3": "-su",
        "pos": "2nd person singular"
      },
      "expansion": "Old Irish -su (2nd person singular)",
      "name": "der"
    }
  ],
  "etymology_text": "From Old Irish -sa (1st person singular) and Old Irish -su (2nd person singular).",
  "forms": [
    {
      "form": "-se",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "gd",
        "2": "suffix",
        "cat2": "emphatic suffixes"
      },
      "expansion": "-sa",
      "name": "head"
    }
  ],
  "lang": "Scottish Gaelic",
  "lang_code": "gd",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 12 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Scottish Gaelic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "-self (emphatic)"
      ],
      "id": "en--sa-gd-suffix-lqO7Y7cW",
      "links": [
        [
          "-self",
          "-self"
        ]
      ],
      "related": [
        {
          "word": "-ne"
        },
        {
          "word": "-san"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-sa"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "gd",
        "2": "sga",
        "3": "-sa",
        "pos": "1st person singular"
      },
      "expansion": "Old Irish -sa (1st person singular)",
      "name": "der"
    },
    {
      "args": {
        "1": "gd",
        "2": "sga",
        "3": "-su",
        "pos": "2nd person singular"
      },
      "expansion": "Old Irish -su (2nd person singular)",
      "name": "der"
    }
  ],
  "etymology_text": "From Old Irish -sa (1st person singular) and Old Irish -su (2nd person singular).",
  "forms": [
    {
      "form": "-se",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "gd",
        "2": "suffix",
        "cat2": "emphatic suffixes"
      },
      "expansion": "-sa",
      "name": "head"
    }
  ],
  "lang": "Scottish Gaelic",
  "lang_code": "gd",
  "pos": "suffix",
  "related": [
    {
      "word": "-ne"
    },
    {
      "word": "-san"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages using catfix",
        "Pages with 12 entries",
        "Pages with entries",
        "Scottish Gaelic emphatic suffixes",
        "Scottish Gaelic entries with incorrect language header",
        "Scottish Gaelic lemmas",
        "Scottish Gaelic suffixes",
        "Scottish Gaelic terms derived from Old Irish"
      ],
      "glosses": [
        "-self (emphatic)"
      ],
      "links": [
        [
          "-self",
          "-self"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-sa"
}