"knetter-" meaning in Dutch

{
  "etymology_text": "From knettergek (“raving mad”), from knetteren (“to crackle”).",
  "head_templates": [
    {
      "args": {
        "1": "nl",
        "2": "prefix"
      },
      "expansion": "knetter-",
      "name": "head"
    }
  ],
  "lang": "Dutch",
  "lang_code": "nl",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Dutch entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Dutch intensifiers",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "very, intensely, incredibly"
      ],
      "id": "en-knetter--nl-prefix-uzgzZd0H",
      "links": [
        [
          "very",
          "very"
        ],
        [
          "intensely",
          "intensely"
        ],
        [
          "incredibly",
          "incredibly"
        ]
      ],
      "raw_glosses": [
        "(informal) very, intensely, incredibly"
      ],
      "tags": [
        "informal",
        "morpheme"
      ]
    }
  ],
  "word": "knetter-"
}

{
  "etymology_text": "From knettergek (“raving mad”), from knetteren (“to crackle”).",
  "head_templates": [
    {
      "args": {
        "1": "nl",
        "2": "prefix"
      },
      "expansion": "knetter-",
      "name": "head"
    }
  ],
  "lang": "Dutch",
  "lang_code": "nl",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Dutch entries with incorrect language header",
        "Dutch informal terms",
        "Dutch intensifiers",
        "Dutch lemmas",
        "Dutch prefixes"
      ],
      "glosses": [
        "very, intensely, incredibly"
      ],
      "links": [
        [
          "very",
          "very"
        ],
        [
          "intensely",
          "intensely"
        ],
        [
          "incredibly",
          "incredibly"
        ]
      ],
      "raw_glosses": [
        "(informal) very, intensely, incredibly"
      ],
      "tags": [
        "informal",
        "morpheme"
      ]
    }
  ],
  "word": "knetter-"
}