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The Collaborative International Dictionary
Boilingly

Boilingly \Boil"ing*ly\, adv. With boiling or ebullition.

And lakes of bitumen rise boiling higher.
--Byron. [1913 Webster] ||

Wiktionary
boilingly

adv. in a boiling manner

Usage examples of "boilingly".

He had just felt so boilingly angry, so frustrated by what had happened to Life Guard that he seemed compelled to do something, to strike out.