"jess" meaning in Icelandic

{
  "etymology_templates": [
    {
      "args": {
        "1": "is",
        "2": "en",
        "3": "yes"
      },
      "expansion": "English yes",
      "name": "der"
    }
  ],
  "etymology_text": "From English yes.",
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "interjection"
      },
      "expansion": "jess",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Icelandic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "yes (exclamation of satisfaction, joy, etc.)"
      ],
      "id": "en-jess-is-intj-xMXYcKpk",
      "links": [
        [
          "yes",
          "yes"
        ]
      ],
      "raw_glosses": [
        "(informal) yes (exclamation of satisfaction, joy, etc.)"
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/jɛsː/"
    },
    {
      "rhymes": "-ɛsː"
    }
  ],
  "word": "jess"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "is",
        "2": "en",
        "3": "yes"
      },
      "expansion": "English yes",
      "name": "der"
    }
  ],
  "etymology_text": "From English yes.",
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "interjection"
      },
      "expansion": "jess",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        "Icelandic entries with incorrect language header",
        "Icelandic informal terms",
        "Icelandic interjections",
        "Icelandic lemmas",
        "Icelandic terms derived from English",
        "Pages with 3 entries",
        "Pages with entries",
        "Rhymes:Icelandic/ɛsː",
        "Rhymes:Icelandic/ɛsː/1 syllable"
      ],
      "glosses": [
        "yes (exclamation of satisfaction, joy, etc.)"
      ],
      "links": [
        [
          "yes",
          "yes"
        ]
      ],
      "raw_glosses": [
        "(informal) yes (exclamation of satisfaction, joy, etc.)"
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/jɛsː/"
    },
    {
      "rhymes": "-ɛsː"
    }
  ],
  "word": "jess"
}