"hoofdrekenaar" meaning in Dutch

{
  "etymology_templates": [
    {
      "args": {
        "1": "nl",
        "2": "hoofdrekenen",
        "3": "aar"
      },
      "expansion": "hoofdrekenen + -aar",
      "name": "suf"
    }
  ],
  "etymology_text": "From hoofdrekenen + -aar.",
  "forms": [
    {
      "form": "hoofdrekenaars",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "-s",
        "3": "-"
      },
      "expansion": "hoofdrekenaar m (plural hoofdrekenaars)",
      "name": "nl-noun"
    }
  ],
  "hyphenation": [
    "hoofd‧re‧ke‧naar"
  ],
  "lang": "Dutch",
  "lang_code": "nl",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Dutch entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Dutch terms suffixed with -aar",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "One who performs mental arithmetic, mental calculation"
      ],
      "id": "en-hoofdrekenaar-nl-noun-~qorf0Kv",
      "links": [
        [
          "mental",
          "mental"
        ],
        [
          "arithmetic",
          "arithmetic"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈɦoːftˌreː.kə.naːr/"
    },
    {
      "ipa": "/ˈɦoːft.reː.kəˌnaːr/"
    }
  ],
  "word": "hoofdrekenaar"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "nl",
        "2": "hoofdrekenen",
        "3": "aar"
      },
      "expansion": "hoofdrekenen + -aar",
      "name": "suf"
    }
  ],
  "etymology_text": "From hoofdrekenen + -aar.",
  "forms": [
    {
      "form": "hoofdrekenaars",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "-s",
        "3": "-"
      },
      "expansion": "hoofdrekenaar m (plural hoofdrekenaars)",
      "name": "nl-noun"
    }
  ],
  "hyphenation": [
    "hoofd‧re‧ke‧naar"
  ],
  "lang": "Dutch",
  "lang_code": "nl",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Dutch entries with incorrect language header",
        "Dutch lemmas",
        "Dutch masculine nouns",
        "Dutch nouns",
        "Dutch nouns with plural in -s",
        "Dutch terms suffixed with -aar",
        "Dutch terms with IPA pronunciation"
      ],
      "glosses": [
        "One who performs mental arithmetic, mental calculation"
      ],
      "links": [
        [
          "mental",
          "mental"
        ],
        [
          "arithmetic",
          "arithmetic"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈɦoːftˌreː.kə.naːr/"
    },
    {
      "ipa": "/ˈɦoːft.reː.kəˌnaːr/"
    }
  ],
  "word": "hoofdrekenaar"
}