"φρούριον" meaning in Grec ancien

{
  "categories": [
    {
      "kind": "other",
      "name": "Dérivations en grec ancien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mots en grec ancien suffixés avec -ιον",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en grec ancien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Grec ancien",
      "orig": "grec ancien",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "lang": "Grec",
      "lang_code": "el",
      "word": "φρούριο"
    }
  ],
  "etymology_texts": [
    "Motdérivé de φρουρός, phrourós (« garde, gardien »), avec le suffixe -ιον, -ion."
  ],
  "lang": "Grec ancien",
  "lang_code": "grc",
  "pos": "noun",
  "pos_title": "Nom commun",
  "raw_tags": [
    "φρούριον, phroúrion"
  ],
  "senses": [
    {
      "glosses": [
        "Poste de garde, forteresse, citadelle."
      ],
      "id": "fr-φρούριον-grc-noun-8~3z4FnK"
    },
    {
      "glosses": [
        "Garnison."
      ],
      "id": "fr-φρούριον-grc-noun-lX-CK-PO"
    }
  ],
  "tags": [
    "neuter"
  ],
  "word": "φρούριον"
}

{
  "categories": [
    "Dérivations en grec ancien",
    "Mots en grec ancien suffixés avec -ιον",
    "Noms communs en grec ancien",
    "grec ancien"
  ],
  "derived": [
    {
      "lang": "Grec",
      "lang_code": "el",
      "word": "φρούριο"
    }
  ],
  "etymology_texts": [
    "Motdérivé de φρουρός, phrourós (« garde, gardien »), avec le suffixe -ιον, -ion."
  ],
  "lang": "Grec ancien",
  "lang_code": "grc",
  "pos": "noun",
  "pos_title": "Nom commun",
  "raw_tags": [
    "φρούριον, phroúrion"
  ],
  "senses": [
    {
      "glosses": [
        "Poste de garde, forteresse, citadelle."
      ]
    },
    {
      "glosses": [
        "Garnison."
      ]
    }
  ],
  "tags": [
    "neuter"
  ],
  "word": "φρούριον"
}