"nervous : Easily agitated or alarmed; edgy, on edge. Apprehensive, anxious, hesitant,..."

“nervous : Easily agitated or alarmed; edgy, on edge.
Apprehensive, anxious, hesitant, worried.
Relating to or affecting the nerves.
(archaic) Having nerves; nervose.
(obsolete) Showing nervous strength; sinewy, vigorous.
(obsolete) Of a piece of writing: forceful, powerful.”

- https://en.wiktionary.org/wiki/nervous#English

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