Jumpy

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wiktionary

ref

From jump +‎ -y.


etymonline

ref

jumpy (adj.)

"nervous," 1869, from jump (n.) in a sense "sudden involuntary movement" + -y (2). Related: Jumpiness. The jumps "state of nervous excitement" is from 1872.

取自“https://www.bigphysics.org/index.php?title=Jumpy&oldid=39939”