"trjá-" meaning in Icelandic

{
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "prefixes"
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      "expansion": "trjá-",
      "name": "head"
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  ],
  "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"
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          "source": "w"
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          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "is",
          "name": "Trees",
          "orig": "is:Trees",
          "parents": [
            "Plants",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "tree; wood, wooden"
      ],
      "id": "en-trjá--is-prefix-99mp067u",
      "links": [
        [
          "tree",
          "tree"
        ],
        [
          "wood",
          "wood"
        ],
        [
          "wooden",
          "wooden"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "trjá-"
}

{
  "head_templates": [
    {
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      "expansion": "trjá-",
      "name": "head"
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  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Icelandic entries with incorrect language header",
        "Icelandic lemmas",
        "Icelandic prefixes",
        "Pages with 1 entry",
        "Pages with entries",
        "is:Trees"
      ],
      "glosses": [
        "tree; wood, wooden"
      ],
      "links": [
        [
          "tree",
          "tree"
        ],
        [
          "wood",
          "wood"
        ],
        [
          "wooden",
          "wooden"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "trjá-"
}