"υπόγειο" meaning in Grieks

{
  "categories": [
    {
      "kind": "other",
      "name": "Woorden in het Grieks",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Woorden in het Grieks met IPA-weergave",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Zelfstandig naamwoord in het Grieks",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Grieks",
  "lang_code": "el",
  "pos": "noun",
  "pos_title": "Zelfstandig naamwoord",
  "senses": [
    {
      "glosses": [
        "kelder"
      ],
      "id": "nl-υπόγειο-el-noun-qaWxEnfY"
    }
  ],
  "sounds": [
    {
      "ipa": "/iˈpoʝio/"
    }
  ],
  "word": "υπόγειο"
}

{
  "categories": [
    "Woorden in het Grieks",
    "Woorden in het Grieks met IPA-weergave",
    "Zelfstandig naamwoord in het Grieks"
  ],
  "lang": "Grieks",
  "lang_code": "el",
  "pos": "noun",
  "pos_title": "Zelfstandig naamwoord",
  "senses": [
    {
      "glosses": [
        "kelder"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/iˈpoʝio/"
    }
  ],
  "word": "υπόγειο"
}