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Synonyms

startle

American  
[stahr-tl] / ˈstɑr tl /

verb (used with object)

  • startles,
    present (3rd person singular)
  • startled,
    past participle,  past
  • startling
    present participle
  1. to disturb or agitate suddenly as by surprise or alarm.

    Synonyms:
    astonish, frighten, scare
  2. to cause to start involuntarily, by or as by a sudden shock.


verb (used without object)

  • startles,
    present (3rd person singular)
  • startled,
    past participle,  past
  • startling
    present participle
  1. to start involuntarily, as from a shock of surprise or alarm.

noun

  1. a sudden shock of surprise, alarm, or the like.

  2. something that startles.

startle British  
/ ˈstɑːtəl /

verb

  1. to be or cause to be surprised or frightened, esp so as to start involuntarily

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Synonym Usage

See shock 1.

Other Word Forms

Derived Forms

Inflected Forms

Participles

Conjugated Forms

Present

Past

Future

Etymology

Origin of startle

First recorded before 1100; Middle English stertlen “to rush, caper,” equivalent to stert(en) “to begin, start” ( see start + -(e)len -le, or continuing Old English steartlian “to kick, struggle”

Explanation

To startle is to jump, like when you're surprised. If you’re sneaking through a dark room and step on a sleeping dog’s tail — you might startle the dog. If she barks, that dog startles you right back! A startle is a quick, sharp movement, like a little jump that happens when you’re surprised or suddenly scared. If you sneak up on your mom and say "Boo!" you’ll startle her and she might jump up in her seat (before she yells at you to quit it). Alarm clocks and barking dogs often startle people. The original meaning of startle, around 1300, was "to run back and forth," from the Old English word styrtan, "to leap up."

Keep Reading on Vocabulary.com

Vocabulary lists containing startle

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

It triggers an automatic "startle response" to any loud noise.

From BBC Apr. 9, 2026

His lyrics also startle the way poems do.

From The Wall Street Journal Dec. 26, 2025

But when she sees another dog, everything changes: she snarls, barks loud enough to startle a city block, and lunges with so much force it takes all my strength to hold her back.

From Salon Aug. 18, 2025

For these L.A. gigs, she has the Breeders, the great veteran alt-rock band whose 1993 classic “Last Splash” can still startle you with its off-kilter intensity.

From Los Angeles Times Aug. 14, 2024

“No, sir, Mr. Trask, Lisa’s used to cooking for nine starving children. Nothing can startle her.”

From "East of Eden" by John Steinbeck

I am not sure what startles more—that the feat was achieved at all or that it was Mr. Koolhaas’s firm that pulled it off.

From The Wall Street Journal Mar. 20, 2026

“They’re a bit of a nuisance, especially if one takes off from a bush next to people and startles them,” Knight said.

From Seattle Times May 3, 2024

Her very English outrage startles him from his role as an Israeli Defense Forces soldier “defending my people” and into that of a teenager defending himself against accusations of being from Manchester.

From Washington Post Apr. 4, 2023

Too many enjoy the heady rush of attention they get from doing or saying something that startles or provokes.

From Los Angeles Times Aug. 28, 2022

Dad clasps her arm in a movement so swift, it startles me.

From "I Can Make This Promise" by Christine Day

"I was startled awake and immediately went to my child's room," he said.

From BBC Aug. 15, 2026

Less than 72 hours later, she startled fans by announcing plans to step away from the spotlight—and the “endless, ongoing public scrutiny” that accompanies it—after wrapping her current tour.

From The Wall Street Journal Aug. 6, 2026

Observers were startled that, given the risks, Ali Khamenei was present in the very centre of Tehran on February 28 rather than in hiding elsewhere in the vast country.

From Barron's Jul. 1, 2026

The initial announcement of SpaceX’s bond sale had startled some investors, some of whom sold their shares.

From MarketWatch Jun. 23, 2026

Still, Clare shrieked, startled by the spirit’s appearance.

From "The Undead Fox of Deadwood Forest" by Aubrey Hartman

“I watched through all hours of the night and at one point screamed into my phone ‘YOU’VE GOT THIS, JACKIE!’ startling my entire family awake.”

From Los Angeles Times Aug. 11, 2026

His words were startling, to say the least, but Schwartz’s description of the president’s true personality was revelatory.

From Salon Aug. 7, 2026

The fall of Brendan Rodgers, and Dermot Desmond's startling evisceration of a celebrated manager, could only be rivalled if Celtic's major shareholder suddenly takes a flamethrower to his relationship with O'Neill.

From BBC Jul. 31, 2026

The bat fell onto a table at the Yellow Deli in Vista, startling patrons.

From Los Angeles Times Jul. 24, 2026

“Are you the musical girl?” he asked, without any startling “Hey!” as he looked down at her very kindly.

From "Little Women" by Louisa May Alcott

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