"τετραετής" meaning in Grec ancien

{
  "categories": [
    {
      "kind": "other",
      "name": "Adjectifs en grec ancien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Compositions en grec ancien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Grec ancien",
      "orig": "grec ancien",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "word": "τετραετία"
    },
    {
      "lang": "Grec",
      "lang_code": "el",
      "word": "τετραετής"
    }
  ],
  "etymology_texts": [
    "Mot composé de τετρα-, tetra (« quatre ») et de ἔτος, étos (« an »)."
  ],
  "lang": "Grec ancien",
  "lang_code": "grc",
  "pos": "adj",
  "pos_title": "Adjectif",
  "raw_tags": [
    "τετραετής, tetraetês"
  ],
  "related": [
    {
      "word": "αὐτοετής"
    },
    {
      "word": "διετής"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en grec ancien",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "De quatre ans."
      ],
      "id": "fr-τετραετής-grc-adj-5TPQlgdo"
    }
  ],
  "word": "τετραετής"
}

{
  "categories": [
    "Adjectifs en grec ancien",
    "Compositions en grec ancien",
    "grec ancien"
  ],
  "derived": [
    {
      "word": "τετραετία"
    },
    {
      "lang": "Grec",
      "lang_code": "el",
      "word": "τετραετής"
    }
  ],
  "etymology_texts": [
    "Mot composé de τετρα-, tetra (« quatre ») et de ἔτος, étos (« an »)."
  ],
  "lang": "Grec ancien",
  "lang_code": "grc",
  "pos": "adj",
  "pos_title": "Adjectif",
  "raw_tags": [
    "τετραετής, tetraetês"
  ],
  "related": [
    {
      "word": "αὐτοετής"
    },
    {
      "word": "διετής"
    }
  ],
  "senses": [
    {
      "categories": [
        "Wiktionnaire:Exemples manquants en grec ancien"
      ],
      "glosses": [
        "De quatre ans."
      ]
    }
  ],
  "word": "τετραετής"
}