"kas-" meaning in Icelandic

{
  "etymology_templates": [
    {
      "args": {
        "1": "7039",
        "2": "Hvað er þetta 'kas' þegar konur eru kasólettar?",
        "3": "What does the kas in kasólettur mean?"
      },
      "expansion": "Icelandic Web of Science: Hvað er þetta 'kas' þegar konur eru kasólettar? (“What does the kas in kasólettur mean?”)",
      "name": "webofscience"
    }
  ],
  "etymology_text": "Derived from the noun kös (“pile, heap of fish”).",
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "prefixes"
      },
      "expansion": "kas-",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Icelandic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "kasbomm"
        },
        {
          "word": "kasheitur"
        },
        {
          "word": "kashlaðinn"
        },
        {
          "word": "kasmekktur"
        },
        {
          "word": "kasóléttur"
        }
      ],
      "glosses": [
        "used in specific compounds, often denoting something pile-like, spherical or pertaining to a heap of fish"
      ],
      "id": "en-kas--is-prefix-bQdiyRie",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "kas-"
}

{
  "derived": [
    {
      "word": "kasbomm"
    },
    {
      "word": "kasheitur"
    },
    {
      "word": "kashlaðinn"
    },
    {
      "word": "kasmekktur"
    },
    {
      "word": "kasóléttur"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "7039",
        "2": "Hvað er þetta 'kas' þegar konur eru kasólettar?",
        "3": "What does the kas in kasólettur mean?"
      },
      "expansion": "Icelandic Web of Science: Hvað er þetta 'kas' þegar konur eru kasólettar? (“What does the kas in kasólettur mean?”)",
      "name": "webofscience"
    }
  ],
  "etymology_text": "Derived from the noun kös (“pile, heap of fish”).",
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "prefixes"
      },
      "expansion": "kas-",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Icelandic entries with incorrect language header",
        "Icelandic lemmas",
        "Icelandic prefixes"
      ],
      "glosses": [
        "used in specific compounds, often denoting something pile-like, spherical or pertaining to a heap of fish"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "kas-"
}