Definition of "nervous"
adjective:
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Easily agitated or alarmed; on edge or edgy.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
Apprehensive, anxious, hesitant, worried.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
Relating to or affecting the nerves.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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