"cool-headedness" meaning in English

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  "etymology_text": "From cool-headed + -ness.",
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  "lang_code": "en",
  "pos": "noun",
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          "ref": "2021 September 22, “National Rail Awards 2021: Margaret (Maggie) Hoey”, in RAIL, number 940, page 59:",
          "text": "Her colleagues said: \"There is no doubt that this complex project could not have been completed as efficiently as it was without the dedication, understanding, cool-headedness and co-operation of Maggie Hoey.\"",
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        "Alternative form of coolheadedness."
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  "word": "cool-headedness"
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        "2": "cool-headed",
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      "expansion": "cool-headed + -ness",
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  ],
  "etymology_text": "From cool-headed + -ness.",
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      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "word": "coolheadedness"
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          "ref": "2021 September 22, “National Rail Awards 2021: Margaret (Maggie) Hoey”, in RAIL, number 940, page 59:",
          "text": "Her colleagues said: \"There is no doubt that this complex project could not have been completed as efficiently as it was without the dedication, understanding, cool-headedness and co-operation of Maggie Hoey.\"",
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