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Synonyms

irresponsible

American  
[ir-i-spon-suh-buhl] / ˌɪr ɪˈspɒn sə bəl /

adjective

  1. said, done, or characterized by a lack of a sense of responsibility.

    His refusal to work shows him to be completely irresponsible.

    Synonyms:
    thoughtless, undependable, unreliable
  2. not capable of or qualified for responsibility, as due to age, circumstances, or a mental deficiency.

  3. not responsible, answerable, or accountable to higher authority.

    irresponsible as a monarch.


noun

  1. an irresponsible person.

irresponsible British  
/ ˌɪrɪˈspɒnsəbəl /

adjective

  1. not showing or done with due care for the consequences of one's actions or attitudes; reckless

  2. not capable of bearing responsibility

  3. archaic not answerable to a higher authority for one's actions

"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 irresponsible

First recorded in 1640–50; ir- 2 + responsible

Explanation

If you're irresponsible, you're careless about the consequences of your actions. You can't really rely on irresponsible people. Being irresponsible is the opposite of being responsible and careful — you do what you like and don't care what happens afterward. Forgetting to feed your dog for a week is irresponsible. Splashing around in a mud puddle in your new white pants is irresponsible. Drug use and unsafe sex are irresponsible. When the government runs up a huge deficit, many people think that's irresponsible. If you have to work with someone irresponsible, good luck: you're going to need it.

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Vocabulary lists containing irresponsible

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:

“The irresponsible reports that have been published stating that Maria Bartiromo was fired or is no longer an employee of Fox are absolutely and unequivocally false,” Bartiromo’s lawyer said today.

From Slate Sep. 4, 2026

That’s probably irresponsible, but I’m so painfully empathetic.

From Los Angeles Times Sep. 2, 2026

The group Environmental Action Germany charged the government was "irresponsible" because it had "failed to adopt a single effective measure for heat protection following an extreme summer that saw thousands of heat-related deaths".

From Barron's Aug. 27, 2026

But time and time again, it seemed financially irresponsible to spend $10,000 a month on a mortgage when I could get a rental for less than half that cost.

From MarketWatch Aug. 10, 2026

“I thought you had more sense after all this time. But you’ve proven to me you do not. Such recklessness using my name! On a case of this importance! You irresponsible girl!”

From "The Detective's Assistant" by Kate Hannigan

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