"roar back" meaning in English

{
  "forms": [
    {
      "form": "roars back",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "roaring back",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "roared back",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "roared back",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "roar back (third-person singular simple present roars back, present participle roaring back, simple past and past participle roared back)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English phrasal verbs with particle (back)",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2023 May 10, Benjamin Mueller, “Pancreatic Cancer Vaccine Shows Promise in Small Trial”, in The New York Times",
          "text": "They would test their novel cancer vaccine against one of the most virulent forms of the disease, a cancer notorious for roaring back even in patients whose tumors had been removed.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To suddenly become active, powerful or functional after a period of decline."
      ],
      "id": "en-roar_back-en-verb-fLJmu1Jz",
      "links": [
        [
          "suddenly",
          "suddenly"
        ],
        [
          "active",
          "active"
        ],
        [
          "powerful",
          "powerful"
        ],
        [
          "functional",
          "functional"
        ],
        [
          "period",
          "period"
        ],
        [
          "decline",
          "decline"
        ]
      ],
      "raw_glosses": [
        "(intransitive, idiomatic) To suddenly become active, powerful or functional after a period of decline."
      ],
      "synonyms": [
        {
          "word": "come roaring back"
        },
        {
          "word": "roar to life"
        }
      ],
      "tags": [
        "idiomatic",
        "intransitive"
      ]
    }
  ],
  "word": "roar back"
}

{
  "forms": [
    {
      "form": "roars back",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "roaring back",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "roared back",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "roared back",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "roar back (third-person singular simple present roars back, present participle roaring back, simple past and past participle roared back)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English idioms",
        "English intransitive verbs",
        "English lemmas",
        "English multiword terms",
        "English phrasal verbs",
        "English phrasal verbs with particle (back)",
        "English terms with quotations",
        "English verbs"
      ],
      "examples": [
        {
          "ref": "2023 May 10, Benjamin Mueller, “Pancreatic Cancer Vaccine Shows Promise in Small Trial”, in The New York Times",
          "text": "They would test their novel cancer vaccine against one of the most virulent forms of the disease, a cancer notorious for roaring back even in patients whose tumors had been removed.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To suddenly become active, powerful or functional after a period of decline."
      ],
      "links": [
        [
          "suddenly",
          "suddenly"
        ],
        [
          "active",
          "active"
        ],
        [
          "powerful",
          "powerful"
        ],
        [
          "functional",
          "functional"
        ],
        [
          "period",
          "period"
        ],
        [
          "decline",
          "decline"
        ]
      ],
      "raw_glosses": [
        "(intransitive, idiomatic) To suddenly become active, powerful or functional after a period of decline."
      ],
      "synonyms": [
        {
          "word": "come roaring back"
        },
        {
          "word": "roar to life"
        }
      ],
      "tags": [
        "idiomatic",
        "intransitive"
      ]
    }
  ],
  "word": "roar back"
}