"-εν-" meaning in Greek

{
  "etymology_text": "Preposition ενin synthesis, at middle position -εν- (-en-)",
  "forms": [
    {
      "form": "-en-",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "prefix",
        "head": "",
        "sort": ""
      },
      "expansion": "-εν- • (-en-)",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "-εν- • (-en-)",
      "name": "el-prefix"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Greek entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "plus + in- + intelligence > understanding, communication",
          "roman": "/sin- -en- ˈnoisi/ > /si.neˈno.i.si/",
          "text": "συν- + -εν- + νόηση > συνεννόηση",
          "type": "example"
        }
      ],
      "glosses": [
        "see prefix εν-"
      ],
      "id": "en--εν--el-prefix-n6~uP8zT",
      "links": [
        [
          "prefix εν-",
          "εν-#Greek"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/en/"
    }
  ],
  "word": "-εν-"
}

{
  "etymology_text": "Preposition ενin synthesis, at middle position -εν- (-en-)",
  "forms": [
    {
      "form": "-en-",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "prefix",
        "head": "",
        "sort": ""
      },
      "expansion": "-εν- • (-en-)",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "-εν- • (-en-)",
      "name": "el-prefix"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Greek entries with incorrect language header",
        "Greek lemmas",
        "Greek prefixes",
        "Greek terms with usage examples",
        "Pages with 1 entry"
      ],
      "examples": [
        {
          "english": "plus + in- + intelligence > understanding, communication",
          "roman": "/sin- -en- ˈnoisi/ > /si.neˈno.i.si/",
          "text": "συν- + -εν- + νόηση > συνεννόηση",
          "type": "example"
        }
      ],
      "glosses": [
        "see prefix εν-"
      ],
      "links": [
        [
          "prefix εν-",
          "εν-#Greek"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/en/"
    }
  ],
  "word": "-εν-"
}