Jumpy (adjective)

Easily startled or excited; nervous or skittish.

Origin:

From the verb "jump" meaning "to move suddenly or quickly", likely originated in the early 19th century.

Examples:

1. She was feeling jumpy after watching a horror movie.
2. He was jumpy after the long flight.
3. The horse was jumpy and difficult to control.
4. The jumpy market made investors nervous.
5. She was jumpy and couldn't sit still.