"-ain" meaning in Middle French

{
  "descendants": [
    {
      "lang": "French",
      "lang_code": "fr",
      "word": "-ain"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "frm",
        "2": ":inh",
        "3": "fro:-ain",
        "text": "1",
        "tree": "++"
      },
      "expansion": "Etymology tree\nProto-Indo-European *-nós\nProto-Italic *-nos\nLatin -nus\nLatin -ānus\nOld French -ain\nMiddle French -ain\nInherited from Old French -ain.",
      "name": "ety"
    }
  ],
  "etymology_text": "Etymology tree\nProto-Indo-European *-nós\nProto-Italic *-nos\nLatin -nus\nLatin -ānus\nOld French -ain\nMiddle French -ain\nInherited from Old French -ain.",
  "head_templates": [
    {
      "args": {
        "1": "frm",
        "2": "suffix"
      },
      "expansion": "-ain",
      "name": "head"
    }
  ],
  "lang": "Middle French",
  "lang_code": "frm",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Middle French entries with etymology texts",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Middle French entries with etymology trees",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Middle French entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages using etymon with no ID",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with etymology trees",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "26 26 20 14 5 9",
          "kind": "other",
          "name": "Old French entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "23 23 16 21 7 11",
          "kind": "other",
          "name": "Pages using etymon with no ID",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "13 13 11 51 4 6",
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "16 16 15 45 3 5",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Forms adjectives from nouns"
      ],
      "id": "en--ain-frm-suffix-uaJP8AVQ",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-ain"
}

{
  "categories": [
    "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-Indo-European",
    "Old French terms derived from Proto-Italic",
    "Old French terms inherited from Latin",
    "Pages using etymon with no ID",
    "Pages with 3 entries",
    "Pages with entries"
  ],
  "descendants": [
    {
      "lang": "French",
      "lang_code": "fr",
      "word": "-ain"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "frm",
        "2": ":inh",
        "3": "fro:-ain",
        "text": "1",
        "tree": "++"
      },
      "expansion": "Etymology tree\nProto-Indo-European *-nós\nProto-Italic *-nos\nLatin -nus\nLatin -ānus\nOld French -ain\nMiddle French -ain\nInherited from Old French -ain.",
      "name": "ety"
    }
  ],
  "etymology_text": "Etymology tree\nProto-Indo-European *-nós\nProto-Italic *-nos\nLatin -nus\nLatin -ānus\nOld French -ain\nMiddle French -ain\nInherited from Old French -ain.",
  "head_templates": [
    {
      "args": {
        "1": "frm",
        "2": "suffix"
      },
      "expansion": "-ain",
      "name": "head"
    }
  ],
  "lang": "Middle French",
  "lang_code": "frm",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Middle French entries with etymology texts",
        "Middle French entries with etymology trees",
        "Middle French entries with incorrect language header",
        "Middle French lemmas",
        "Middle French suffixes",
        "Middle French terms derived from Latin",
        "Middle French terms derived from Old French",
        "Middle French terms derived from Proto-Indo-European",
        "Middle French terms derived from Proto-Italic",
        "Middle French terms inherited from Latin",
        "Middle French terms inherited from Old French",
        "Pages using catfix",
        "Pages using etymon with no ID",
        "Pages with 3 entries",
        "Pages with entries",
        "Pages with etymology trees"
      ],
      "glosses": [
        "Forms adjectives from nouns"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-ain"
}