roar back

verb

To suddenly become active, powerful or functional after a period of decline.

Similar
come roaring backroar to life
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Meanings

verbroar back (third-person singular simple present roars back, present participle roaring back, simple past and past participle roared back)

present singular third person roars back · participle present roaring back · participle past roared back · past roared back

  1. idiomaticintransitiveTo suddenly become active, powerful or functional after a period of decline.

    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.

    2023 May 10, Benjamin Mueller, “Pancreatic Cancer Vaccine Shows Promise in Small Trial”, in The New York Times

    Synonyms: come roaring back, roar to life

Synonyms & antonyms

verbTo suddenly become active, powerful or functional after a period of decline.

Similar
come roaring backroar to life
Cite this entry
APA

roar back. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/roar%20back

MLA

“roar back.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/roar%20back. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “roar back,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/roar%20back.

Source: roar back on Wiktionary, CC BY-SA 4.0.