recklessness
n. uncountablen. the quality of being willing to take big risks without thinking about the possible dangers. It often describes someone who acts in a way that could hurt themselves or others.
n. the quality of acting in a way that shows no care for the dangers or the feelings of others. Often implies a lack of prudence or a deliberate disregard for safety.
The driver's recklessness caused a serious accident.
The company's recklessness in ignoring safety warnings eventually led to a massive fine and a public scandal.
While some view the explorer's recklessness as a necessary trait for discovery, others argue that such a lack of caution is simply irresponsible and dangerous to the team.
From Middle English reklesnes, reklesnesse, rekelesnesse (also assibilated as rechelesnes, reccheleesnesse), from Old English rēcelēasnes (“recklessness, carelessness, negligence”), equivalent to reckless + -ness.