"-e-" meaning in Saterland Frisian

{
  "etymology_templates": [
    {
      "args": {
        "1": "de",
        "2": "-n-"
      },
      "expansion": "German -n-",
      "name": "cog"
    },
    {
      "args": {
        "1": "nl",
        "2": "-en-"
      },
      "expansion": "Dutch -en-",
      "name": "cog"
    },
    {
      "args": {
        "1": "sv",
        "2": "-e-"
      },
      "expansion": "Swedish -e-",
      "name": "cog"
    }
  ],
  "etymology_text": "Akin to German -n-/-e-, Dutch -en-/-e- and Swedish -e-.",
  "head_templates": [
    {
      "args": {
        "1": "stq",
        "2": "interfix"
      },
      "expansion": "-e-",
      "name": "head"
    }
  ],
  "lang": "Saterland Frisian",
  "lang_code": "stq",
  "pos": "interfix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 11 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Saterland Frisian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Saterland Frisian interfixes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Saterland Frisian links with redundant target parameters",
          "parents": [
            "Links with redundant target parameters",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Múus (“mouse”) + Buk (“male animal”) → Muzebuk (“male mouse”)",
          "type": "example"
        }
      ],
      "glosses": [
        "Genitival interfix indicating that the former element is a characteristic of the latter."
      ],
      "id": "en--e--stq-interfix-zb9Df6xO",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/-ə-/"
    }
  ],
  "word": "-e-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "de",
        "2": "-n-"
      },
      "expansion": "German -n-",
      "name": "cog"
    },
    {
      "args": {
        "1": "nl",
        "2": "-en-"
      },
      "expansion": "Dutch -en-",
      "name": "cog"
    },
    {
      "args": {
        "1": "sv",
        "2": "-e-"
      },
      "expansion": "Swedish -e-",
      "name": "cog"
    }
  ],
  "etymology_text": "Akin to German -n-/-e-, Dutch -en-/-e- and Swedish -e-.",
  "head_templates": [
    {
      "args": {
        "1": "stq",
        "2": "interfix"
      },
      "expansion": "-e-",
      "name": "head"
    }
  ],
  "lang": "Saterland Frisian",
  "lang_code": "stq",
  "pos": "interfix",
  "senses": [
    {
      "categories": [
        "Pages using catfix",
        "Pages with 11 entries",
        "Pages with entries",
        "Saterland Frisian entries with incorrect language header",
        "Saterland Frisian interfixes",
        "Saterland Frisian lemmas",
        "Saterland Frisian links with redundant target parameters"
      ],
      "examples": [
        {
          "text": "Múus (“mouse”) + Buk (“male animal”) → Muzebuk (“male mouse”)",
          "type": "example"
        }
      ],
      "glosses": [
        "Genitival interfix indicating that the former element is a characteristic of the latter."
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/-ə-/"
    }
  ],
  "word": "-e-"
}