"◌̙" meaning in Translingual

{
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "character",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "IPA symbols",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "name": "Translingual diacritical marks",
          "parents": [
            "Diacritical marks",
            "Letters, symbols, and punctuation",
            "Symbols",
            "Orthography",
            "Writing",
            "Human behaviour",
            "Language",
            "Human",
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "retracted tongue root."
      ],
      "id": "en-◌̙-mul-character-l0OZgpjm",
      "links": [
        [
          "retracted tongue root",
          "w:retracted tongue root"
        ]
      ],
      "raw_glosses": [
        "(IPA) retracted tongue root."
      ],
      "tags": [
        "IPA",
        "diacritic"
      ]
    }
  ],
  "word": "◌̙"
}

{
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "character",
  "senses": [
    {
      "categories": [
        "IPA symbols",
        "Translingual diacritical marks",
        "Translingual entries with incorrect language header",
        "Translingual lemmas"
      ],
      "glosses": [
        "retracted tongue root."
      ],
      "links": [
        [
          "retracted tongue root",
          "w:retracted tongue root"
        ]
      ],
      "raw_glosses": [
        "(IPA) retracted tongue root."
      ],
      "tags": [
        "IPA",
        "diacritic"
      ]
    }
  ],
  "word": "◌̙"
}