This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Present participle of swinge.

adj. large, immense

adj. powerful, scathing (a swingeing verbal attack)

adj. Huge; very large.

Great; huge.

adj. severe; punishingly bad

"The TUC urged ministers to reconsider the "swingeing" cuts to public spending and focus instead on other ways to reduce the deficit, such as the suggested "Robin Hood" tax on financial transactions."

bad   

huge    whopping   

swinge