startle

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Related to startler: startles

startle

/star·tle/ (stahr´tl)
1. to make a quick involuntary movement as in alarm, surprise, or fright.
2. to become alarmed, surprised, or frightened.

startle

(stăr′tĕl) [ME. sterten, stand up stiffly; move quickly]
A response to a sudden stimulus marked by jerking body movements and some or all of the following: defensive posture, tremors, sweating, widened pupils, and a temporary increase in pulse and respiratory rates.