"-ojn" meaning in Espéranto

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes de suffixes en espéranto",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Espéranto",
      "orig": "espéranto",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Espéranto",
  "lang_code": "eo",
  "pos": "suffix",
  "pos_title": "Forme de suffixe",
  "senses": [
    {
      "form_of": [
        {
          "word": "-o"
        }
      ],
      "glosses": [
        "Accusatif pluriel de -o."
      ],
      "id": "fr--ojn-eo-suffix-P3pu7YHJ"
    }
  ],
  "sounds": [
    {
      "ipa": "\\ojn\\"
    }
  ],
  "tags": [
    "form-of",
    "morpheme"
  ],
  "word": "-ojn"
}

{
  "categories": [
    "Formes de suffixes en espéranto",
    "espéranto"
  ],
  "lang": "Espéranto",
  "lang_code": "eo",
  "pos": "suffix",
  "pos_title": "Forme de suffixe",
  "senses": [
    {
      "form_of": [
        {
          "word": "-o"
        }
      ],
      "glosses": [
        "Accusatif pluriel de -o."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ojn\\"
    }
  ],
  "tags": [
    "form-of",
    "morpheme"
  ],
  "word": "-ojn"
}