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Synonyms

reckless

American  
[rek-lis] / ˈrɛk lɪs /

adjective

  1. utterly unconcerned about the consequences of some action; without caution; careless (usually followed byof ).

    to be reckless of danger.

    Synonyms:
    imprudent, negligent, incautious, heedless, rash
    Antonyms:
    careful
  2. characterized by or proceeding from such carelessness.

    reckless extravagance.


reckless British  
/ ˈrɛklɪs /

adjective

  1. having or showing no regard for danger or consequences; heedless; rash

    a reckless driver

    a reckless attempt

"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

Other Word Forms

Etymology

Origin of reckless

First recorded before 900; Middle English rekles, Old English reccelēas “careless” (cognate with German ruchlos ); see reck, -less

Explanation

If you are reckless, you don't think or care about the consequences of your words or actions, like a reckless driver who speeds while texting, knitting, and eating a sandwich. The word reckless comes from the Old English word receleas, meaning "careless, thoughtless, heedless." If you have a reckless attitude, you aren't concerned about what happens to yourself or others who are affected by your actions. In this usage, reckless is the opposite of considerate. Reckless friends will invite people you don't know to your house because with your parents away, it's party time. Surprise!

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Vocabulary lists containing reckless

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:

"What makes this reckless behaviour even more appalling is that in some cases it is being done for social media likes regardless of the potentially devastating impact it might have on innocent people and themselves."

From BBC Aug. 17, 2026

If you only followed the headlines, it was difficult to reconcile the two dominant narratives about Gen Z. Depending on the week, we were either frighteningly reckless or hopelessly boring.

From Salon Aug. 15, 2026

According to the watchdog group, officers sought charges against Ludwig even after they realized the mistake, booking him on charges of reckless driving and resisting arrest.

From Los Angeles Times Aug. 11, 2026

Manuel Hernandez, 46, was arrested on 13 counts of reckless endangerment, officers confirmed later.

From Barron's Aug. 10, 2026

If they were reckless and tried to run the rapids, their wooden canoes would most likely capsize and get ripped to pieces.

From "Death on the River of Doubt" by Samantha Seiple

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