"-j" meaning in Esperanto

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "grc",
        "3": "-οι"
      },
      "expansion": "Ancient Greek -οι (-oi)",
      "name": "der"
    },
    {
      "args": {
        "1": "eo",
        "2": "la",
        "3": "-ae"
      },
      "expansion": "Latin -ae",
      "name": "der"
    }
  ],
  "etymology_text": "From the nominative plural in /i/ or /j/ found in many European languages, particularly the original diphthongs Ancient Greek -οι (-oi), -αι (-ai), and Latin -ae.",
  "head_templates": [
    {
      "args": {
        "1": "eo",
        "2": "suffix"
      },
      "expansion": "-j",
      "name": "head"
    }
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Esperanto 1894 Universala Vortaro",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto BRO1",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 5 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Words approved by the Akademio de Esperanto",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "juna patro (young father) → junaj patroj (young fathers)"
        },
        {
          "text": "mia vundita mano (my injured hand) → miaj vunditaj manoj (my injured hands)"
        }
      ],
      "glosses": [
        "-s, -es (marks the plural form of nouns, adjectives, and some pronouns)"
      ],
      "head_nr": 1,
      "id": "en--j-eo-suffix-yvnXnsTA",
      "links": [
        [
          "-s",
          "-s"
        ],
        [
          "-es",
          "-es"
        ],
        [
          "plural",
          "plural"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/j/"
    },
    {
      "ipa": "[i̯]"
    }
  ],
  "word": "-j"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "grc",
        "3": "-οι"
      },
      "expansion": "Ancient Greek -οι (-oi)",
      "name": "der"
    },
    {
      "args": {
        "1": "eo",
        "2": "la",
        "3": "-ae"
      },
      "expansion": "Latin -ae",
      "name": "der"
    }
  ],
  "etymology_text": "From the nominative plural in /i/ or /j/ found in many European languages, particularly the original diphthongs Ancient Greek -οι (-oi), -αι (-ai), and Latin -ae.",
  "head_templates": [
    {
      "args": {
        "1": "eo",
        "2": "suffix"
      },
      "expansion": "-j",
      "name": "head"
    }
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Esperanto 1894 Universala Vortaro",
        "Esperanto BRO1",
        "Esperanto entries with incorrect language header",
        "Esperanto lemmas",
        "Esperanto suffixes",
        "Esperanto terms derived from Ancient Greek",
        "Esperanto terms derived from Latin",
        "Pages with 5 entries",
        "Pages with entries",
        "Words approved by the Akademio de Esperanto"
      ],
      "examples": [
        {
          "text": "juna patro (young father) → junaj patroj (young fathers)"
        },
        {
          "text": "mia vundita mano (my injured hand) → miaj vunditaj manoj (my injured hands)"
        }
      ],
      "glosses": [
        "-s, -es (marks the plural form of nouns, adjectives, and some pronouns)"
      ],
      "head_nr": 1,
      "links": [
        [
          "-s",
          "-s"
        ],
        [
          "-es",
          "-es"
        ],
        [
          "plural",
          "plural"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/j/"
    },
    {
      "ipa": "[i̯]"
    }
  ],
  "word": "-j"
}

{
  "called_from": "page/1713/20221215",
  "msg": "later head without list of senses,template node #, -j/Esperanto",
  "path": [
    "-j"
  ],
  "section": "Esperanto",
  "subsection": "suffix",
  "title": "-j",
  "trace": ""
}