"kuro" meaning in Tocharian B

{
  "etymology_text": "A form of kwär- (“to age, grow old”).",
  "head_templates": [
    {
      "args": {
        "1": "txb",
        "2": "adjective"
      },
      "expansion": "kuro",
      "name": "head"
    }
  ],
  "lang": "Tocharian B",
  "lang_code": "txb",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Tocharian B entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "listless"
      ],
      "id": "en-kuro-txb-adj-tZMgLac9",
      "links": [
        [
          "listless",
          "listless"
        ]
      ]
    }
  ],
  "word": "kuro"
}

{
  "etymology_text": "A form of kwär- (“to age, grow old”).",
  "head_templates": [
    {
      "args": {
        "1": "txb",
        "2": "adjective"
      },
      "expansion": "kuro",
      "name": "head"
    }
  ],
  "lang": "Tocharian B",
  "lang_code": "txb",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Tocharian B adjectives",
        "Tocharian B entries with incorrect language header",
        "Tocharian B lemmas"
      ],
      "glosses": [
        "listless"
      ],
      "links": [
        [
          "listless",
          "listless"
        ]
      ]
    }
  ],
  "word": "kuro"
}