"◌̈" meaning in English

{
  "lang": "English",
  "lang_code": "en",
  "pos": "character",
  "senses": [
    {
      "categories": [],
      "glosses": [
        "Used to indicate that two identical vowels occur in separate morphemes and are pronounced separately: coöperate, reënter, reëstablish, noöne, reöpen."
      ],
      "id": "en-◌̈-en-character-LRSy1-ej",
      "links": [
        [
          "morpheme",
          "morpheme#English"
        ],
        [
          "coöperate",
          "coöperate#English"
        ],
        [
          "reënter",
          "reënter#English"
        ],
        [
          "reëstablish",
          "reëstablish#English"
        ],
        [
          "noöne",
          "noöne#English"
        ],
        [
          "reöpen",
          "reöpen#English"
        ]
      ],
      "raw_glosses": [
        "(dated) Used to indicate that two identical vowels occur in separate morphemes and are pronounced separately: coöperate, reënter, reëstablish, noöne, reöpen."
      ],
      "tags": [
        "dated",
        "diacritic"
      ]
    },
    {
      "glosses": [
        "Used to indicate that the marked vowel is the nucleus of its own syllable: Boötes, Brontë, Chloë, Zoë, (dated) aëroplane, aërial."
      ],
      "id": "en-◌̈-en-character-vDK9Ya-e",
      "links": [
        [
          "Boötes",
          "Boötes#English"
        ],
        [
          "Brontë",
          "Brontë#English"
        ],
        [
          "Chloë",
          "Chloë#English"
        ],
        [
          "Zoë",
          "Zoë#English"
        ],
        [
          "aëroplane",
          "aëroplane#English"
        ],
        [
          "aërial",
          "aërial#English"
        ]
      ],
      "tags": [
        "diacritic"
      ]
    },
    {
      "categories": [
        {
          "_dis": "25 26 49",
          "kind": "other",
          "name": "English diacritical marks",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "25 25 50",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "30 25 45",
          "kind": "other",
          "name": "English terms in nonstandard scripts",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Retained in foreign (mostly French) loan words where vowels are pronounced separately: naïve (or naive), Noël (or Noel), but also for umlaut in German Götterdämmerung, Führer, and terms derived from given names, such as Möbius strip"
      ],
      "id": "en-◌̈-en-character-nxZ8aS1G",
      "links": [
        [
          "naïve",
          "naïve#English"
        ],
        [
          "naive",
          "naive#English"
        ],
        [
          "Noël",
          "Noël#English"
        ],
        [
          "Noel",
          "Noel#English"
        ],
        [
          "Götterdämmerung",
          "Götterdämmerung#English"
        ],
        [
          "Führer",
          "Führer#English"
        ],
        [
          "Möbius strip",
          "Möbius strip#English"
        ]
      ],
      "tags": [
        "diacritic"
      ]
    }
  ],
  "word": "◌̈"
}

{
  "categories": [
    "English diacritical marks",
    "English entries with incorrect language header",
    "English lemmas",
    "English terms in nonstandard scripts",
    "Pages with 15 entries",
    "Pages with entries"
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "character",
  "senses": [
    {
      "categories": [
        "English dated terms"
      ],
      "glosses": [
        "Used to indicate that two identical vowels occur in separate morphemes and are pronounced separately: coöperate, reënter, reëstablish, noöne, reöpen."
      ],
      "links": [
        [
          "morpheme",
          "morpheme#English"
        ],
        [
          "coöperate",
          "coöperate#English"
        ],
        [
          "reënter",
          "reënter#English"
        ],
        [
          "reëstablish",
          "reëstablish#English"
        ],
        [
          "noöne",
          "noöne#English"
        ],
        [
          "reöpen",
          "reöpen#English"
        ]
      ],
      "raw_glosses": [
        "(dated) Used to indicate that two identical vowels occur in separate morphemes and are pronounced separately: coöperate, reënter, reëstablish, noöne, reöpen."
      ],
      "tags": [
        "dated",
        "diacritic"
      ]
    },
    {
      "glosses": [
        "Used to indicate that the marked vowel is the nucleus of its own syllable: Boötes, Brontë, Chloë, Zoë, (dated) aëroplane, aërial."
      ],
      "links": [
        [
          "Boötes",
          "Boötes#English"
        ],
        [
          "Brontë",
          "Brontë#English"
        ],
        [
          "Chloë",
          "Chloë#English"
        ],
        [
          "Zoë",
          "Zoë#English"
        ],
        [
          "aëroplane",
          "aëroplane#English"
        ],
        [
          "aërial",
          "aërial#English"
        ]
      ],
      "tags": [
        "diacritic"
      ]
    },
    {
      "glosses": [
        "Retained in foreign (mostly French) loan words where vowels are pronounced separately: naïve (or naive), Noël (or Noel), but also for umlaut in German Götterdämmerung, Führer, and terms derived from given names, such as Möbius strip"
      ],
      "links": [
        [
          "naïve",
          "naïve#English"
        ],
        [
          "naive",
          "naive#English"
        ],
        [
          "Noël",
          "Noël#English"
        ],
        [
          "Noel",
          "Noel#English"
        ],
        [
          "Götterdämmerung",
          "Götterdämmerung#English"
        ],
        [
          "Führer",
          "Führer#English"
        ],
        [
          "Möbius strip",
          "Möbius strip#English"
        ]
      ],
      "tags": [
        "diacritic"
      ]
    }
  ],
  "word": "◌̈"
}