"-ou" meaning in Old Galician-Portuguese

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "gl",
            "2": "-ou"
          },
          "expansion": "Galician: -ou",
          "name": "desc"
        }
      ],
      "text": "Galician: -ou"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "pt",
            "2": "-ou"
          },
          "expansion": "Portuguese: -ou",
          "name": "desc"
        }
      ],
      "text": "Portuguese: -ou"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "Inherited"
      },
      "expansion": "Inherited",
      "name": "glossary"
    },
    {
      "args": {
        "1": "roa-opt",
        "2": "la",
        "3": "-āvit",
        "4": "",
        "5": "",
        "g": "",
        "g2": "",
        "g3": "",
        "id": "",
        "lit": "",
        "nocat": "",
        "pos": "",
        "sc": "",
        "sort": "",
        "tr": "",
        "ts": ""
      },
      "expansion": "Latin -āvit",
      "name": "inh"
    },
    {
      "args": {
        "1": "roa-opt",
        "2": "la",
        "3": "-āvit"
      },
      "expansion": "Inherited from Latin -āvit",
      "name": "inh+"
    }
  ],
  "etymology_text": "Inherited from Latin -āvit.",
  "head_templates": [
    {
      "args": {
        "1": "roa-opt",
        "2": "suffix",
        "3": "1st conj."
      },
      "expansion": "-ou (1st conj.)",
      "name": "head"
    }
  ],
  "lang": "Old Galician-Portuguese",
  "lang_code": "roa-opt",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Old Galician-Portuguese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 5 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "amar (“to love”) + -ou → amou (“[he/she/it] loved”)",
          "type": "example"
        },
        {
          "text": "cantar (“to sing”) + -ou → cantou (“[he/she/it] sang”)",
          "type": "example"
        }
      ],
      "glosses": [
        "a suffix indicating the third-person singular indicative preterite of a verb in -ar"
      ],
      "id": "en--ou-roa-opt-suffix-1Gus8P5g",
      "links": [
        [
          "third-person singular",
          "third-person singular#English"
        ],
        [
          "indicative",
          "indicative#English"
        ],
        [
          "preterite",
          "preterite#English"
        ],
        [
          "-ar",
          "-ar#Old_Galician-Portuguese"
        ]
      ],
      "tags": [
        "conjugation-1",
        "morpheme"
      ]
    }
  ],
  "word": "-ou"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "gl",
            "2": "-ou"
          },
          "expansion": "Galician: -ou",
          "name": "desc"
        }
      ],
      "text": "Galician: -ou"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "pt",
            "2": "-ou"
          },
          "expansion": "Portuguese: -ou",
          "name": "desc"
        }
      ],
      "text": "Portuguese: -ou"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "Inherited"
      },
      "expansion": "Inherited",
      "name": "glossary"
    },
    {
      "args": {
        "1": "roa-opt",
        "2": "la",
        "3": "-āvit",
        "4": "",
        "5": "",
        "g": "",
        "g2": "",
        "g3": "",
        "id": "",
        "lit": "",
        "nocat": "",
        "pos": "",
        "sc": "",
        "sort": "",
        "tr": "",
        "ts": ""
      },
      "expansion": "Latin -āvit",
      "name": "inh"
    },
    {
      "args": {
        "1": "roa-opt",
        "2": "la",
        "3": "-āvit"
      },
      "expansion": "Inherited from Latin -āvit",
      "name": "inh+"
    }
  ],
  "etymology_text": "Inherited from Latin -āvit.",
  "head_templates": [
    {
      "args": {
        "1": "roa-opt",
        "2": "suffix",
        "3": "1st conj."
      },
      "expansion": "-ou (1st conj.)",
      "name": "head"
    }
  ],
  "lang": "Old Galician-Portuguese",
  "lang_code": "roa-opt",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Old Galician-Portuguese entries with incorrect language header",
        "Old Galician-Portuguese lemmas",
        "Old Galician-Portuguese suffixes",
        "Old Galician-Portuguese terms derived from Latin",
        "Old Galician-Portuguese terms inherited from Latin",
        "Pages with 5 entries",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "amar (“to love”) + -ou → amou (“[he/she/it] loved”)",
          "type": "example"
        },
        {
          "text": "cantar (“to sing”) + -ou → cantou (“[he/she/it] sang”)",
          "type": "example"
        }
      ],
      "glosses": [
        "a suffix indicating the third-person singular indicative preterite of a verb in -ar"
      ],
      "links": [
        [
          "third-person singular",
          "third-person singular#English"
        ],
        [
          "indicative",
          "indicative#English"
        ],
        [
          "preterite",
          "preterite#English"
        ],
        [
          "-ar",
          "-ar#Old_Galician-Portuguese"
        ]
      ],
      "tags": [
        "conjugation-1",
        "morpheme"
      ]
    }
  ],
  "word": "-ou"
}