"hardhack" meaning in English

{
  "forms": [
    {
      "form": "hardhacks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "hardhack (countable and uncountable, plural hardhacks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
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          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Rose family plants",
          "orig": "en:Rose family plants",
          "parents": [
            "Rosales order plants",
            "Plants",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A plant, the steeplebush, of either species Spiraea tomentosa, of eastern North American, or Spiraea douglasii, of western North America."
      ],
      "id": "en-hardhack-en-noun-KDiTAzEq",
      "links": [
        [
          "steeplebush",
          "steeplebush"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "hardhack"
}

{
  "forms": [
    {
      "form": "hardhacks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "hardhack (countable and uncountable, plural hardhacks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English nouns",
        "English uncountable nouns",
        "Entries using missing taxonomic name (species)",
        "en:Rose family plants"
      ],
      "glosses": [
        "A plant, the steeplebush, of either species Spiraea tomentosa, of eastern North American, or Spiraea douglasii, of western North America."
      ],
      "links": [
        [
          "steeplebush",
          "steeplebush"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "hardhack"
}