In a fidgety manner; while making restless movements or showing signs of nervousness or impatience.
From fidgety plus -ly (adverb suffix). A regular adverbial formation describing behavior done in a fidgety way.
The word 'fidgetily' appears mostly in fiction—authors use it to show anxiety or deception without having a character say it outright. It's a literary shorthand for what's happening inside.
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