"◌̈" meaning in Tagalog

{
  "lang": "Tagalog",
  "lang_code": "tl",
  "pos": "character",
  "senses": [
    {
      "glosses": [
        "Only used in ë: centralized vowel"
      ],
      "id": "en-◌̈-tl-character-VpC46gZM",
      "links": [
        [
          "ë",
          "ë#Tagalog"
        ],
        [
          "centralized",
          "centralized"
        ]
      ],
      "tags": [
        "diacritic"
      ]
    },
    {
      "categories": [
        {
          "_dis": "20 80",
          "kind": "other",
          "name": "Tagalog entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "31 69",
          "kind": "other",
          "name": "Tagalog terms in nonstandard scripts",
          "parents": [
            "Terms in nonstandard scripts",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "19 81",
          "kind": "topical",
          "name": "Tagalog diacritical marks",
          "parents": [
            "Diacritical marks",
            "Letters, symbols, and punctuation",
            "Symbols",
            "Orthography",
            "Writing",
            "Human behaviour",
            "Language",
            "Human",
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Used to indicate that a vowel must be pronounced separately from the previous consonant such as in gabï (gab-i), butö (but-o)"
      ],
      "id": "en-◌̈-tl-character-XuZajtn-",
      "links": [
        [
          "gabï",
          "gabï#Tagalog"
        ],
        [
          "gab-i",
          "gab-i#Tagalog"
        ],
        [
          "butö",
          "butö#Tagalog"
        ],
        [
          "but-o",
          "but-o#Tagalog"
        ]
      ],
      "raw_glosses": [
        "(obsolete) Used to indicate that a vowel must be pronounced separately from the previous consonant such as in gabï (gab-i), butö (but-o)"
      ],
      "tags": [
        "diacritic",
        "obsolete"
      ]
    }
  ],
  "word": "◌̈"
}

{
  "categories": [
    "Pages with 15 entries",
    "Tagalog diacritical marks",
    "Tagalog entries with incorrect language header",
    "Tagalog lemmas",
    "Tagalog terms in nonstandard scripts"
  ],
  "lang": "Tagalog",
  "lang_code": "tl",
  "pos": "character",
  "senses": [
    {
      "glosses": [
        "Only used in ë: centralized vowel"
      ],
      "links": [
        [
          "ë",
          "ë#Tagalog"
        ],
        [
          "centralized",
          "centralized"
        ]
      ],
      "tags": [
        "diacritic"
      ]
    },
    {
      "categories": [
        "Tagalog terms with obsolete senses"
      ],
      "glosses": [
        "Used to indicate that a vowel must be pronounced separately from the previous consonant such as in gabï (gab-i), butö (but-o)"
      ],
      "links": [
        [
          "gabï",
          "gabï#Tagalog"
        ],
        [
          "gab-i",
          "gab-i#Tagalog"
        ],
        [
          "butö",
          "butö#Tagalog"
        ],
        [
          "but-o",
          "but-o#Tagalog"
        ]
      ],
      "raw_glosses": [
        "(obsolete) Used to indicate that a vowel must be pronounced separately from the previous consonant such as in gabï (gab-i), butö (but-o)"
      ],
      "tags": [
        "diacritic",
        "obsolete"
      ]
    }
  ],
  "word": "◌̈"
}