Here are some synonyms for skittishness:
* Nervous
* Fidgety
* Restless
* Timid
* Jumpy
* Apprehensive
* High-strung
Examples:
* "The horse was skittish and kept trying to bolt from the stable."
* "The crowd was skittish after the bomb scare."
* "She has a skittish personality and easily gets flustered in social situations."
Origin:
The word "skittish" likely originated from the Old English word "scit," which meant "to move quickly" or "to leap."