startle

The word "startle" describes a sudden, brief moment of surprise or alarm that causes an involuntary reaction—like jumping, flinching, or gasping. It's more than just being surprised; there is a distinct element of being caught off guard by something unexpected. For example: "The thunder startled the sleeping dog," or "She was startled by a shadow moving across the wall."

Startle implies a quick, physical response to something that breaks your concentration or expectation. It's often triggered by loud noises, sudden movements, or unexpected appearances. A jack-in-the-box is designed to startle!

While it can be unpleasant, "startle" doesn't necessarily mean someone is truly frightened. It's a milder, more momentary reaction than fear. You might be startled by a balloon popping, but you wouldn't likely be terrified. However, repeated or intense startling experiences can contribute to a sense of anxiety.

The word comes from the Old English "steortelian," meaning "to leap or jump." So next time something makes you jump, remember that you've been startled—momentarily thrown off balance by an unexpected event.