"-ir" meaning in Old French

{
  "etymology_links": [
    [
      "-īre",
      "-ire#Latin"
    ]
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "fro",
        "2": ":der",
        "3": "la:-īre"
      },
      "expansion": "[Appendix:Glossary#derived_terms|Derived]] from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"id\" : \"verb suffix\", \"children\" : [ ], \"status\" : \"redlink\", \"lang_name\" : \"Proto-Italic\", \"term\" : \"*-jezi\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" }, { \"keyword_abbrev\" : \"influ.\", \"keyword_label\" : \"Influenced by\", \"terms\" : [ { \"id\" : \"verb suffix\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Latin\", \"term\" : \"-ere\", \"lang\" : \"la\" } ], \"keyword\" : \"influence\" } ], \"lang_name\" : \"Latin\", \"term\" : \"-īre\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"Old French\", \"term\" : \"-ir\", \"status\" : \"ok\", \"lang\" : \"fro\" }\" data-lang=\"fro\" data-title=\"-ir\">",
      "name": "ety"
    },
    {
      "args": {
        "1": "fro",
        "2": "la",
        "3": "-īre"
      },
      "expansion": "Latin -īre",
      "name": "der"
    }
  ],
  "etymology_text": "From Latin -īre, the ending of the present active infinitive form of fourth conjugation verbs.",
  "head_templates": [
    {
      "args": {
        "1": "fro",
        "2": "suffix"
      },
      "expansion": "-ir",
      "name": "head"
    }
  ],
  "lang": "Old French",
  "lang_code": "fro",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Old French entries with etymon",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Old French entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages using etymon with no ID",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 13 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with etymon",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "used to form infinitives of second conjugation verbs"
      ],
      "id": "en--ir-fro-suffix-yBkFWl42",
      "related": [
        {
          "word": "-er"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-ir"
}

{
  "etymology_links": [
    [
      "-īre",
      "-ire#Latin"
    ]
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "fro",
        "2": ":der",
        "3": "la:-īre"
      },
      "expansion": "[Appendix:Glossary#derived_terms|Derived]] from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"id\" : \"verb suffix\", \"children\" : [ ], \"status\" : \"redlink\", \"lang_name\" : \"Proto-Italic\", \"term\" : \"*-jezi\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" }, { \"keyword_abbrev\" : \"influ.\", \"keyword_label\" : \"Influenced by\", \"terms\" : [ { \"id\" : \"verb suffix\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Latin\", \"term\" : \"-ere\", \"lang\" : \"la\" } ], \"keyword\" : \"influence\" } ], \"lang_name\" : \"Latin\", \"term\" : \"-īre\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"Old French\", \"term\" : \"-ir\", \"status\" : \"ok\", \"lang\" : \"fro\" }\" data-lang=\"fro\" data-title=\"-ir\">",
      "name": "ety"
    },
    {
      "args": {
        "1": "fro",
        "2": "la",
        "3": "-īre"
      },
      "expansion": "Latin -īre",
      "name": "der"
    }
  ],
  "etymology_text": "From Latin -īre, the ending of the present active infinitive form of fourth conjugation verbs.",
  "head_templates": [
    {
      "args": {
        "1": "fro",
        "2": "suffix"
      },
      "expansion": "-ir",
      "name": "head"
    }
  ],
  "lang": "Old French",
  "lang_code": "fro",
  "pos": "suffix",
  "related": [
    {
      "word": "-er"
    }
  ],
  "senses": [
    {
      "categories": [
        "Old French entries with etymon",
        "Old French entries with incorrect language header",
        "Old French lemmas",
        "Old French suffixes",
        "Old French terms derived from Latin",
        "Old French terms derived from Proto-Italic",
        "Pages using etymon with no ID",
        "Pages with 13 entries",
        "Pages with entries",
        "Pages with etymon"
      ],
      "glosses": [
        "used to form infinitives of second conjugation verbs"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-ir"
}