"-잖아" meaning in Korean

{
  "etymology_templates": [
    {
      "args": {
        "1": "ko",
        "2": "-지 않아"
      },
      "expansion": "Contraction of 지 않아 (-ji ana)",
      "name": "contraction"
    }
  ],
  "etymology_text": "Contraction of 지 않아 (-ji ana).",
  "forms": [
    {
      "form": "-jana",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "suffix"
      },
      "expansion": "-잖아 • (-jana)",
      "name": "ko-pos"
    }
  ],
  "lang": "Korean",
  "lang_code": "ko",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "_dis": "49 51",
          "kind": "other",
          "name": "Korean entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "45 55",
          "kind": "other",
          "name": "Korean terms with redundant script codes",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "48 52",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "49 51",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "bold_roman_offsets": [
            [
              21,
              25
            ]
          ],
          "bold_text_offsets": [
            [
              10,
              12
            ]
          ],
          "english": "And you know it.",
          "roman": "Geurigo neo geugeo aljana.",
          "text": "그리고 너 그거 알잖아.",
          "type": "example"
        }
      ],
      "glosses": [
        "Used to emphasize some statement is correct."
      ],
      "id": "en--잖아-ko-suffix-7Dg4bpca",
      "raw_glosses": [
        "(used with verbs) Used to emphasize some statement is correct."
      ],
      "raw_tags": [
        "used with verbs"
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "categories": [
        {
          "_dis": "49 51",
          "kind": "other",
          "name": "Korean entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "45 55",
          "kind": "other",
          "name": "Korean terms with redundant script codes",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "44 56",
          "kind": "other",
          "name": "Korean terms with redundant transliterations",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "48 52",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "49 51",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Used to contradict previous statement is indeed correct."
      ],
      "id": "en--잖아-ko-suffix-L9s6u556",
      "raw_glosses": [
        "(used with verbs) Used to contradict previous statement is indeed correct."
      ],
      "raw_tags": [
        "used with verbs"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-잖아"
}

{
  "categories": [
    "Korean contractions",
    "Korean entries with incorrect language header",
    "Korean inflectional suffixes",
    "Korean lemmas",
    "Korean suffixes",
    "Korean terms with redundant script codes",
    "Korean terms with redundant transliterations",
    "Korean terms without ko-IPA template",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "ko",
        "2": "-지 않아"
      },
      "expansion": "Contraction of 지 않아 (-ji ana)",
      "name": "contraction"
    }
  ],
  "etymology_text": "Contraction of 지 않아 (-ji ana).",
  "forms": [
    {
      "form": "-jana",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "suffix"
      },
      "expansion": "-잖아 • (-jana)",
      "name": "ko-pos"
    }
  ],
  "lang": "Korean",
  "lang_code": "ko",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Korean terms with usage examples"
      ],
      "examples": [
        {
          "bold_roman_offsets": [
            [
              21,
              25
            ]
          ],
          "bold_text_offsets": [
            [
              10,
              12
            ]
          ],
          "english": "And you know it.",
          "roman": "Geurigo neo geugeo aljana.",
          "text": "그리고 너 그거 알잖아.",
          "type": "example"
        }
      ],
      "glosses": [
        "Used to emphasize some statement is correct."
      ],
      "raw_glosses": [
        "(used with verbs) Used to emphasize some statement is correct."
      ],
      "raw_tags": [
        "used with verbs"
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "glosses": [
        "Used to contradict previous statement is indeed correct."
      ],
      "raw_glosses": [
        "(used with verbs) Used to contradict previous statement is indeed correct."
      ],
      "raw_tags": [
        "used with verbs"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-잖아"
}