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"nervous" is also used as a crossword clue. If that's what you saw, the answer is often jittery (7 letters).
Definitions
unpredictably excitable (especially of horses)
Word origin
From Middle English nervous (“composed of or incorporating nerves”), from Latin nervōsus (“nervous; sinewy; energetic, vigorous”), from nervus (“nerve; muscle; sinew, tendon; (figuratively) energy, power; nerve; force, strength, vigour”) (ultimately from Proto-Indo-European *snéh₁wr̥ (“sinew, tendon”)) + -ōsus (suffix meaning ‘full of, prone to’ forming adjectives from nouns). The English word is analysable as nerve + -ous.
Used in a sentence
“[T]here is nothing in marble equal to the Venus of Medici, for ſoftneſs and tenderneſs; as there is nothing ſo ſtrong and nervous, as the Hercules Farneſe.”
“Fortescutus illustratus, or a commentary on that nervous treatise De Laudibus Legum Angliæ […] [book title]”
“Nervous, clear, and striking, was almost all that he uttered […].”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Uneasy and tense”7 letters
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