"i-mutation" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "?",
        "head": "i-mutation"
      },
      "expansion": "i-mutation",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Linguistics",
          "orig": "en:Linguistics",
          "parents": [
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A type of sound change in which a vowel's place of articulation is raised (becomes more close) under the influence of a following /i/, /j/ or similar sound."
      ],
      "id": "en-i-mutation-en-noun-N1W6G6Vv",
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "sound change",
          "sound change"
        ],
        [
          "articulation",
          "articulation"
        ],
        [
          "raise",
          "raise"
        ],
        [
          "close",
          "close"
        ]
      ],
      "raw_glosses": [
        "(linguistics) A type of sound change in which a vowel's place of articulation is raised (becomes more close) under the influence of a following /i/, /j/ or similar sound."
      ],
      "related": [
        {
          "word": "a-mutation"
        },
        {
          "word": "u-mutation"
        }
      ],
      "synonyms": [
        {
          "word": "umlaut"
        },
        {
          "english": "in the context of Germanic languages",
          "word": "i-umlaut"
        }
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ],
      "translations": [
        {
          "code": "de",
          "lang": "German",
          "sense": "type of sound change in which a vowel is raised by /i/ after",
          "tags": [
            "masculine"
          ],
          "word": "i-Umlaut"
        }
      ]
    }
  ],
  "word": "i-mutation"
}

{
  "head_templates": [
    {
      "args": {
        "1": "?",
        "head": "i-mutation"
      },
      "expansion": "i-mutation",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "a-mutation"
    },
    {
      "word": "u-mutation"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "en:Linguistics"
      ],
      "glosses": [
        "A type of sound change in which a vowel's place of articulation is raised (becomes more close) under the influence of a following /i/, /j/ or similar sound."
      ],
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "sound change",
          "sound change"
        ],
        [
          "articulation",
          "articulation"
        ],
        [
          "raise",
          "raise"
        ],
        [
          "close",
          "close"
        ]
      ],
      "raw_glosses": [
        "(linguistics) A type of sound change in which a vowel's place of articulation is raised (becomes more close) under the influence of a following /i/, /j/ or similar sound."
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "umlaut"
    },
    {
      "english": "in the context of Germanic languages",
      "word": "i-umlaut"
    }
  ],
  "translations": [
    {
      "code": "de",
      "lang": "German",
      "sense": "type of sound change in which a vowel is raised by /i/ after",
      "tags": [
        "masculine"
      ],
      "word": "i-Umlaut"
    }
  ],
  "word": "i-mutation"
}