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Synonyms

haywire

American  
[hey-wahyuhr] / ˈheɪˌwaɪər /

noun

  1. wire used to bind bales of hay.


adjective

Informal.
  1. in disorder.

    The town is haywire because of the bus strike.

  2. out of control; disordered; crazy.

    The car went haywire. He's been haywire since he got the bad news.

haywire British  
/ ˈheɪˌwaɪə /

adjective

  1. (of things) not functioning properly; disorganized (esp in the phrase go haywire )

  2. (of people) erratic or crazy

"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

haywire Idioms  
  1. see go haywire.


Etymology

Origin of haywire

First recorded in 1900–05; hay + wire

Explanation

When something goes haywire, it's out of control or completely chaotic. You'll sense that things have gone haywire at a birthday party if suddenly the young guests are having a crazed water gun fight indoors. A riot is an extreme example of things going haywire, when people get angry enough about something that they ignore rules and laws, breaking windows and setting things on fire. A less serious case of things gone haywire could be a flock of chickens escaping an enclosure, running loose in your vegetable garden. The literal, and original, meaning of haywire is "wire used to bind hay." The wire's "springy unpredictability" led to today's common definition.

Keep Reading on Vocabulary.com

Vocabulary lists containing haywire

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.

One sign buyers are desperate to get their hands on crude that can bypass Hormuz is the fact that prices on either side of the strait have gone haywire.

From The Wall Street Journal • Mar. 11, 2026

"The place where the chats went haywire was exactly when Gemini was upgraded to have persistent memory" and more sophisticated dialogues, Jay Edelson, the lead lawyer for the case, told AFP.

From Barron's • Mar. 4, 2026

I had heard a bit about this rehearsal process, and the part of my mind that needs to understand was just haywire during those first few days.”

From Los Angeles Times • Jan. 5, 2026

The plunge in stocks — by about 30% in less than three weeks — sent their portfolio balances haywire.

From MarketWatch • Nov. 24, 2025

As fantastic as the technology was, no one wanted to be crushed like a bug if it went haywire.

From "The Last Last-Day-of-Summer" by Lamar Giles