English Reference
adjective

reckless

adj.
US /ˈɹɛkɫəs/ UK /ɹˈɛkləs/ reck·less

  1. 01 B2 Upper Intermediate

    doing something dangerous without worrying about the risks or results.

    acting or done without regard to consequences or danger; showing a lack of caution.

    Simple

    The driver was arrested for reckless driving after he went through a red light.

    In context

    The company's reckless expansion into international markets without proper research led to a significant financial crisis within two years.

    Pitfall
    He was reckless of his driving. He was reckless with his driving.

    Use 'with' when describing the activity or object someone is being careless about.

    rashimpulsiveheedless
  2. 02 C1 Advanced Formal Law

    not caring about the effect your actions have on other people.

    characterised by a lack of concern for the rights or safety of others.

    Simple

    The judge said the manager showed a reckless disregard for the safety of the workers.

    In context

    The prosecution argued that the defendant acted with reckless indifference to human life, justifying a more severe charge than simple negligence.

Usage reckless behaviour


From Middle English rekles, reckeles, rekkeles, (also recheles), from Old English rēcelēas (“reckless, careless, negligent”), equivalent to reck + -less. Cognate with West Frisian roekeleas (“reckless”), Dutch roekeloos (“reckless”), German Low German ruuklos (“careless”), German ruchlos (“careless, notorious”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Old English rēcelēas
Level B2 · Upper Intermediate
Frequency Frequent
Updated