"-es" meaning in Old Saxon

{
  "descendants": [
    {
      "descendants": [
        {
          "lang": "Low German",
          "lang_code": "nds",
          "word": "-s"
        }
      ],
      "lang": "Middle Low German",
      "lang_code": "gml",
      "word": "-es"
    },
    {
      "descendants": [
        {
          "lang": "Low German",
          "lang_code": "nds",
          "word": "-s"
        }
      ],
      "lang": "Middle Low German",
      "lang_code": "gml",
      "word": "-s"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "osx",
        "2": "gem-pro",
        "3": "*-as"
      },
      "expansion": "Proto-Germanic *-as",
      "name": "inh"
    },
    {
      "args": {
        "1": "osx",
        "2": "ine-pro",
        "3": "*-es"
      },
      "expansion": "Proto-Indo-European *-es",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Germanic *-as, *-is, from Proto-Indo-European *-es, *-oes (plural ending).",
  "head_templates": [
    {
      "args": {
        "1": "osx",
        "2": "suffix"
      },
      "expansion": "-es",
      "name": "head"
    }
  ],
  "lang": "Old Saxon",
  "lang_code": "osx",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "_dis": "58 42",
          "kind": "other",
          "name": "Old Saxon entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "possessive marker, indicating that an object belongs to the noun"
      ],
      "id": "en--es-osx-suffix-cw~lcXia",
      "tags": [
        "morpheme"
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "bold_text_offsets": [
            [
              3,
              5
            ]
          ],
          "english": "days",
          "tags": [
            "adverb"
          ],
          "text": "dages",
          "translation": "days",
          "type": "example"
        },
        {
          "bold_text_offsets": [
            [
              4,
              6
            ]
          ],
          "english": "nights",
          "tags": [
            "adverb"
          ],
          "text": "nahtes",
          "translation": "nights",
          "type": "example"
        }
      ],
      "glosses": [
        "used in formation of adverbs"
      ],
      "id": "en--es-osx-suffix-SYEcPHxl",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/-ɛs/"
    }
  ],
  "word": "-es"
}

{
  "categories": [
    "Old Saxon entries with incorrect language header",
    "Old Saxon lemmas",
    "Old Saxon suffixes",
    "Old Saxon terms derived from Proto-Germanic",
    "Old Saxon terms derived from Proto-Indo-European",
    "Old Saxon terms inherited from Proto-Germanic",
    "Old Saxon terms inherited from Proto-Indo-European",
    "Pages with 24 entries",
    "Pages with entries"
  ],
  "descendants": [
    {
      "descendants": [
        {
          "lang": "Low German",
          "lang_code": "nds",
          "word": "-s"
        }
      ],
      "lang": "Middle Low German",
      "lang_code": "gml",
      "word": "-es"
    },
    {
      "descendants": [
        {
          "lang": "Low German",
          "lang_code": "nds",
          "word": "-s"
        }
      ],
      "lang": "Middle Low German",
      "lang_code": "gml",
      "word": "-s"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "osx",
        "2": "gem-pro",
        "3": "*-as"
      },
      "expansion": "Proto-Germanic *-as",
      "name": "inh"
    },
    {
      "args": {
        "1": "osx",
        "2": "ine-pro",
        "3": "*-es"
      },
      "expansion": "Proto-Indo-European *-es",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Germanic *-as, *-is, from Proto-Indo-European *-es, *-oes (plural ending).",
  "head_templates": [
    {
      "args": {
        "1": "osx",
        "2": "suffix"
      },
      "expansion": "-es",
      "name": "head"
    }
  ],
  "lang": "Old Saxon",
  "lang_code": "osx",
  "pos": "suffix",
  "senses": [
    {
      "glosses": [
        "possessive marker, indicating that an object belongs to the noun"
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "categories": [
        "Old Saxon terms with usage examples"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              3,
              5
            ]
          ],
          "english": "days",
          "tags": [
            "adverb"
          ],
          "text": "dages",
          "translation": "days",
          "type": "example"
        },
        {
          "bold_text_offsets": [
            [
              4,
              6
            ]
          ],
          "english": "nights",
          "tags": [
            "adverb"
          ],
          "text": "nahtes",
          "translation": "nights",
          "type": "example"
        }
      ],
      "glosses": [
        "used in formation of adverbs"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/-ɛs/"
    }
  ],
  "word": "-es"
}