in a nervous, tense, or daring and unconventional manner.
From 'edgy' plus the adverbial suffix '-ly' (from Old English '-lice'), creating an adverb form that describes how something is done edgily.
The '-ly' suffix is one of English's most productive tools: you can add it to almost any adjective to make an adverb, which is why 'edgily' feels natural even though we rarely say it—it's the invisible grammar doing its job!
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