"-fu" meaning in English

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        "2": "kung fu",
        "3": "kung-fu"
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  "etymology_text": "From kung-fu.",
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  "lang_code": "en",
  "pos": "suffix",
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      "derived": [
        {
          "word": "Google-fu"
        }
      ],
      "examples": [
        {
          "text": "Google + -fu → Google-fu",
          "type": "example"
        },
        {
          "text": "script + -fu → script-fu",
          "type": "example"
        },
        {
          "text": "My Google-fu is weak!",
          "type": "example"
        },
        {
          "text": "Aragorn uses Ranger-fu to figure out that Sam and Frodo have taken a boat.",
          "type": "example"
        }
      ],
      "glosses": [
        "Used to form nouns indicating expertise or mastery of specified skill or area of knowledge."
      ],
      "id": "en--fu-en-suffix-Ar3WbhvW",
      "links": [
        [
          "expertise",
          "expertise#English"
        ],
        [
          "mastery",
          "mastery#English"
        ]
      ],
      "raw_glosses": [
        "(slang) Used to form nouns indicating expertise or mastery of specified skill or area of knowledge."
      ],
      "related": [
        {
          "word": "fu"
        }
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        "morpheme",
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  ],
  "sounds": [
    {
      "ipa": "/fuː/",
      "tags": [
        "UK"
      ]
    },
    {
      "rhymes": "-uː"
    },
    {
      "homophone": "foo"
    }
  ],
  "word": "-fu"
}

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  "derived": [
    {
      "word": "Google-fu"
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  ],
  "etymology_templates": [
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  ],
  "etymology_text": "From kung-fu.",
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  "lang_code": "en",
  "pos": "suffix",
  "related": [
    {
      "word": "fu"
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          "text": "Google + -fu → Google-fu",
          "type": "example"
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        {
          "text": "script + -fu → script-fu",
          "type": "example"
        },
        {
          "text": "My Google-fu is weak!",
          "type": "example"
        },
        {
          "text": "Aragorn uses Ranger-fu to figure out that Sam and Frodo have taken a boat.",
          "type": "example"
        }
      ],
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      ],
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      "ipa": "/fuː/",
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      "homophone": "foo"
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  "word": "-fu"
}