"-ioun" meaning in Middle English

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "en",
            "2": "-ion"
          },
          "expansion": "English: -ion",
          "name": "desc"
        }
      ],
      "text": "English: -ion"
    }
  ],
  "etymology_number": 1,
  "etymology_templates": [
    {
      "args": {
        "1": "enm",
        "2": "fro",
        "3": "-ion"
      },
      "expansion": "Old French -ion",
      "name": "bor"
    },
    {
      "args": {
        "1": "enm",
        "2": "la",
        "3": "-iō",
        "4": "-iō, -iōnem"
      },
      "expansion": "Latin -iō, -iōnem",
      "name": "der"
    }
  ],
  "etymology_text": "Borrowed from Old French -ion, from Latin -iō, -iōnem.",
  "head_templates": [
    {
      "args": {
        "1": "enm",
        "2": "suffix"
      },
      "expansion": "-ioun",
      "name": "head"
    }
  ],
  "lang": "Middle English",
  "lang_code": "enm",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "_dis": "84 16",
          "kind": "other",
          "name": "Middle English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Forms nouns from French or Latin roots; -ion."
      ],
      "id": "en--ioun-enm-suffix-CzgI2FrU",
      "links": [
        [
          "-ion",
          "-ion#English"
        ]
      ],
      "raw_glosses": [
        "(not productive) Forms nouns from French or Latin roots; -ion."
      ],
      "synonyms": [
        {
          "word": "-ion"
        },
        {
          "word": "-ioune"
        },
        {
          "word": "-iun"
        },
        {
          "word": "-yon"
        },
        {
          "word": "-yone"
        },
        {
          "word": "-youn"
        },
        {
          "word": "-youne"
        }
      ],
      "tags": [
        "idiomatic",
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/-iˈuːn/"
    },
    {
      "ipa": "/-jun/"
    }
  ],
  "word": "-ioun"
}

{
  "etymology_number": 2,
  "head_templates": [
    {
      "args": {
        "1": "enm",
        "2": "suffix"
      },
      "expansion": "-ioun",
      "name": "head"
    }
  ],
  "lang": "Middle English",
  "lang_code": "enm",
  "pos": "suffix",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "-ian",
          "word": "-ien"
        }
      ],
      "glosses": [
        "Alternative form of -ien (“-ian”)"
      ],
      "id": "en--ioun-enm-suffix-cJx-BYfS",
      "links": [
        [
          "-ien",
          "-ien#Middle_English:_ian"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "morpheme"
      ]
    }
  ],
  "word": "-ioun"
}

{
  "categories": [
    "Middle English entries with incorrect language header",
    "Middle English lemmas",
    "Middle English suffixes",
    "Middle English terms borrowed from Old French",
    "Middle English terms derived from Latin",
    "Middle English terms derived from Old French",
    "Middle English terms with IPA pronunciation"
  ],
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "en",
            "2": "-ion"
          },
          "expansion": "English: -ion",
          "name": "desc"
        }
      ],
      "text": "English: -ion"
    }
  ],
  "etymology_number": 1,
  "etymology_templates": [
    {
      "args": {
        "1": "enm",
        "2": "fro",
        "3": "-ion"
      },
      "expansion": "Old French -ion",
      "name": "bor"
    },
    {
      "args": {
        "1": "enm",
        "2": "la",
        "3": "-iō",
        "4": "-iō, -iōnem"
      },
      "expansion": "Latin -iō, -iōnem",
      "name": "der"
    }
  ],
  "etymology_text": "Borrowed from Old French -ion, from Latin -iō, -iōnem.",
  "head_templates": [
    {
      "args": {
        "1": "enm",
        "2": "suffix"
      },
      "expansion": "-ioun",
      "name": "head"
    }
  ],
  "lang": "Middle English",
  "lang_code": "enm",
  "pos": "suffix",
  "senses": [
    {
      "glosses": [
        "Forms nouns from French or Latin roots; -ion."
      ],
      "links": [
        [
          "-ion",
          "-ion#English"
        ]
      ],
      "raw_glosses": [
        "(not productive) Forms nouns from French or Latin roots; -ion."
      ],
      "tags": [
        "idiomatic",
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/-iˈuːn/"
    },
    {
      "ipa": "/-jun/"
    }
  ],
  "synonyms": [
    {
      "word": "-ion"
    },
    {
      "word": "-ioune"
    },
    {
      "word": "-iun"
    },
    {
      "word": "-yon"
    },
    {
      "word": "-yone"
    },
    {
      "word": "-youn"
    },
    {
      "word": "-youne"
    }
  ],
  "word": "-ioun"
}

{
  "categories": [
    "Middle English entries with incorrect language header",
    "Middle English lemmas",
    "Middle English suffixes"
  ],
  "etymology_number": 2,
  "head_templates": [
    {
      "args": {
        "1": "enm",
        "2": "suffix"
      },
      "expansion": "-ioun",
      "name": "head"
    }
  ],
  "lang": "Middle English",
  "lang_code": "enm",
  "pos": "suffix",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "-ian",
          "word": "-ien"
        }
      ],
      "glosses": [
        "Alternative form of -ien (“-ian”)"
      ],
      "links": [
        [
          "-ien",
          "-ien#Middle_English:_ian"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "morpheme"
      ]
    }
  ],
  "word": "-ioun"
}