"stiffen" meaning in English

{
  "categories": [
    {
      "kind": "other",
      "name": "Terms suffixed with -en",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "stiff",
        "2": "en"
      },
      "expansion": "stiff + -en",
      "name": "ety-suffix"
    }
  ],
  "etymology_text": "stiff + -en",
  "forms": [
    {
      "form": "stiffen",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "stiffens",
      "tags": [
        "third-person",
        "singular"
      ]
    },
    {
      "form": "stiffened",
      "tags": [
        "past"
      ]
    },
    {
      "form": "stiffened",
      "tags": [
        "past",
        "participle"
      ]
    },
    {
      "form": "stiffening",
      "tags": [
        "present",
        "participle"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Verbs",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "The mouse stiffened when the shadow went by."
        }
      ],
      "glosses": [
        "If you stiffen, you stop moving and make your muscles hard."
      ],
      "id": "simple-stiffen-en-verb-NtdBh2m5",
      "raw_tags": [
        "intransitive"
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "Verbs",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "By the morning after the accident, my hand had stiffened so much that I couldn't move it."
        }
      ],
      "glosses": [
        "If your muscles or joints stiffen, they become painful to move."
      ],
      "id": "simple-stiffen-en-verb-mw-qq9RE",
      "raw_tags": [
        "intransitive"
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "text": "We'll have to stiffen the airplane wing or it could break in flight."
        }
      ],
      "glosses": [
        "If you stiffen something, you make it stronger or harder so that it is more difficult to bend."
      ],
      "id": "simple-stiffen-en-verb-AKbFAp8p",
      "raw_tags": [
        "transitive"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈstɪfən/"
    },
    {
      "audio": "LL-Q1860 (eng)-Vealhurl-stiffen.wav",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "stiffen"
}

{
  "categories": [
    "Terms suffixed with -en"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "stiff",
        "2": "en"
      },
      "expansion": "stiff + -en",
      "name": "ety-suffix"
    }
  ],
  "etymology_text": "stiff + -en",
  "forms": [
    {
      "form": "stiffen",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "stiffens",
      "tags": [
        "third-person",
        "singular"
      ]
    },
    {
      "form": "stiffened",
      "tags": [
        "past"
      ]
    },
    {
      "form": "stiffened",
      "tags": [
        "past",
        "participle"
      ]
    },
    {
      "form": "stiffening",
      "tags": [
        "present",
        "participle"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Intransitive verbs",
        "Verbs"
      ],
      "examples": [
        {
          "text": "The mouse stiffened when the shadow went by."
        }
      ],
      "glosses": [
        "If you stiffen, you stop moving and make your muscles hard."
      ],
      "raw_tags": [
        "intransitive"
      ]
    },
    {
      "categories": [
        "Intransitive verbs",
        "Verbs"
      ],
      "examples": [
        {
          "text": "By the morning after the accident, my hand had stiffened so much that I couldn't move it."
        }
      ],
      "glosses": [
        "If your muscles or joints stiffen, they become painful to move."
      ],
      "raw_tags": [
        "intransitive"
      ]
    },
    {
      "categories": [
        "Transitive verbs"
      ],
      "examples": [
        {
          "text": "We'll have to stiffen the airplane wing or it could break in flight."
        }
      ],
      "glosses": [
        "If you stiffen something, you make it stronger or harder so that it is more difficult to bend."
      ],
      "raw_tags": [
        "transitive"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈstɪfən/"
    },
    {
      "audio": "LL-Q1860 (eng)-Vealhurl-stiffen.wav",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "stiffen"
}