"ㆆ" meaning in Middle Korean

{
  "etymology_text": "From ㅇ (null consonant), with an additional stroke.",
  "forms": [
    {
      "form": "q",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "okm",
        "2": "letter",
        "tr": "q"
      },
      "expansion": "ㆆ (q)",
      "name": "head"
    }
  ],
  "lang": "Middle Korean",
  "lang_code": "okm",
  "pos": "character",
  "related": [
    {
      "_dis1": "0 0",
      "roman": "ng",
      "word": "ㆁ"
    },
    {
      "_dis1": "0 0",
      "word": "ㅇ"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "_dis": "20 20 57 4",
          "kind": "other",
          "name": "Middle Korean entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "20 19 57 3",
          "kind": "other",
          "name": "Middle Korean terms with redundant transliterations",
          "parents": [
            "Terms with redundant transliterations",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Transcribes [ʔ] in Chinese. This was not a sound in Middle Korean."
      ],
      "id": "en-ㆆ-okm-character-uiLHMrBq",
      "tags": [
        "letter"
      ]
    },
    {
      "glosses": [
        "Used to represent an archiphoneme which tenses the subsequent consonant."
      ],
      "id": "en-ㆆ-okm-character-StvvL7xN",
      "links": [
        [
          "archiphoneme",
          "archiphoneme#English"
        ]
      ],
      "tags": [
        "letter"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ʔ/"
    },
    {
      "ipa": "/◌͈/"
    }
  ],
  "word": "ㆆ"
}

{
  "categories": [
    "Middle Korean entries with incorrect language header",
    "Middle Korean lemmas",
    "Middle Korean letters",
    "Middle Korean terms with IPA pronunciation",
    "Middle Korean terms with redundant transliterations"
  ],
  "etymology_text": "From ㅇ (null consonant), with an additional stroke.",
  "forms": [
    {
      "form": "q",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "okm",
        "2": "letter",
        "tr": "q"
      },
      "expansion": "ㆆ (q)",
      "name": "head"
    }
  ],
  "lang": "Middle Korean",
  "lang_code": "okm",
  "pos": "character",
  "related": [
    {
      "roman": "ng",
      "word": "ㆁ"
    },
    {
      "word": "ㅇ"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Transcribes [ʔ] in Chinese. This was not a sound in Middle Korean."
      ],
      "tags": [
        "letter"
      ]
    },
    {
      "glosses": [
        "Used to represent an archiphoneme which tenses the subsequent consonant."
      ],
      "links": [
        [
          "archiphoneme",
          "archiphoneme#English"
        ]
      ],
      "tags": [
        "letter"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ʔ/"
    },
    {
      "ipa": "/◌͈/"
    }
  ],
  "word": "ㆆ"
}