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ringing frost; keen frost; hard frost (Anglophile); piercing cold (Praline); bitter cold (Anglophile); crackling frost (not as much of a calque as you'd think: go to and search for "Jack Frost"  blogspot.com Liv Bliss) | |||
| cold enough to freeze the balls off a brass monkey | |||
| black frost | |||
| frostiness | |||