"ja" meaning in Esperanto

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "de",
        "3": "ja"
      },
      "expansion": "German ja",
      "name": "bor"
    },
    {
      "args": {
        "1": "pl",
        "2": "jo"
      },
      "expansion": "Polish jo",
      "name": "cog"
    },
    {
      "args": {
        "1": "yi",
        "2": "יאָ"
      },
      "expansion": "Yiddish יאָ (yo)",
      "name": "cog"
    },
    {
      "args": {
        "1": "en",
        "2": "yea"
      },
      "expansion": "English yea",
      "name": "cog"
    },
    {
      "args": {
        "1": "eo",
        "2": "jes"
      },
      "expansion": "jes",
      "name": "m"
    }
  ],
  "etymology_text": "Borrowed from German ja. Compare Polish jo, Yiddish יאָ (yo), English yea. Related to jes.",
  "head_templates": [
    {
      "args": {
        "1": "eo",
        "2": "adverb"
      },
      "expansion": "ja",
      "name": "head"
    }
  ],
  "hyphenation": [
    "ja"
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "adv",
  "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": "Words approved by the Akademio de Esperanto",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "But the good Soviet times will never return, because they never existed.\n(literally, “But the good Soviet time will never come back. It indeed never existed.”)",
          "ref": "2015, Kalle Kniivilä, “Sopiro al Sovetio [Yearning for the Soviet Union]”, in Krimeo estas nia [Crimea is ours]",
          "text": "Sed la bona soveta tempo neniam revenos. Ĝi ja neniam ekzistis.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "indeed"
      ],
      "id": "en-ja-eo-adv-2Iij5OqV",
      "links": [
        [
          "indeed",
          "indeed"
        ]
      ],
      "related": [
        {
          "english": "therefore, indeed, so",
          "word": "do"
        },
        {
          "english": "exactly",
          "word": "ekzakte"
        },
        {
          "english": "factually",
          "word": "fakte"
        },
        {
          "english": "just, right, exactly",
          "word": "ĝuste"
        },
        {
          "english": "yes, exactly",
          "word": "jese"
        },
        {
          "english": "really, actually",
          "word": "reale"
        },
        {
          "english": "truly",
          "word": "vere"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ja]"
    }
  ],
  "word": "ja"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "de",
        "3": "ja"
      },
      "expansion": "German ja",
      "name": "bor"
    },
    {
      "args": {
        "1": "pl",
        "2": "jo"
      },
      "expansion": "Polish jo",
      "name": "cog"
    },
    {
      "args": {
        "1": "yi",
        "2": "יאָ"
      },
      "expansion": "Yiddish יאָ (yo)",
      "name": "cog"
    },
    {
      "args": {
        "1": "en",
        "2": "yea"
      },
      "expansion": "English yea",
      "name": "cog"
    },
    {
      "args": {
        "1": "eo",
        "2": "jes"
      },
      "expansion": "jes",
      "name": "m"
    }
  ],
  "etymology_text": "Borrowed from German ja. Compare Polish jo, Yiddish יאָ (yo), English yea. Related to jes.",
  "head_templates": [
    {
      "args": {
        "1": "eo",
        "2": "adverb"
      },
      "expansion": "ja",
      "name": "head"
    }
  ],
  "hyphenation": [
    "ja"
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "adv",
  "related": [
    {
      "english": "therefore, indeed, so",
      "word": "do"
    },
    {
      "english": "exactly",
      "word": "ekzakte"
    },
    {
      "english": "factually",
      "word": "fakte"
    },
    {
      "english": "just, right, exactly",
      "word": "ĝuste"
    },
    {
      "english": "yes, exactly",
      "word": "jese"
    },
    {
      "english": "really, actually",
      "word": "reale"
    },
    {
      "english": "truly",
      "word": "vere"
    }
  ],
  "senses": [
    {
      "categories": [
        "Esperanto 1894 Universala Vortaro",
        "Esperanto BRO1",
        "Esperanto adverbs",
        "Esperanto entries with incorrect language header",
        "Esperanto lemmas",
        "Esperanto terms borrowed from German",
        "Esperanto terms derived from German",
        "Esperanto terms with IPA pronunciation",
        "Esperanto terms with audio links",
        "Esperanto terms with quotations",
        "Words approved by the Akademio de Esperanto"
      ],
      "examples": [
        {
          "english": "But the good Soviet times will never return, because they never existed.\n(literally, “But the good Soviet time will never come back. It indeed never existed.”)",
          "ref": "2015, Kalle Kniivilä, “Sopiro al Sovetio [Yearning for the Soviet Union]”, in Krimeo estas nia [Crimea is ours]",
          "text": "Sed la bona soveta tempo neniam revenos. Ĝi ja neniam ekzistis.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "indeed"
      ],
      "links": [
        [
          "indeed",
          "indeed"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ja]"
    }
  ],
  "word": "ja"
}