spook
As a verb, this word captures a sudden, visceral reaction of fear, often associated with animals or people who are startled by an unexpected noise or movement. It implies a sharp transition from calm to panic, resulting in an instinctive flight response. As a noun, the term carries two distinct connotations. In a supernatural sense, it evokes a ghostly or eerie presence. In a professional context, it serves as a slang term for intelligence officers, playing on the idea that spies operate invisibly and unexpectedly, much like ghosts.
Meanings
To frighten or startle someone or an animal, often causing them to react with sudden fear or panic.
"The loud bang spooked the horse, causing it to bolt.|"
To become suddenly frightened or nervous.
"The cat spooked when the vacuum cleaner started running.|"