reckless

adjective | reck·less

1. : characterized by the creation of a substantial and unjustifiable risk to the lives, safety, or rights of others and by a conscious and sometimes wanton and willful disregard for or indifference to that risk that is a gross deviation from the standard of care a reasonable person would exercise in like circumstances — see also involuntary manslaughter at manslaughter, reckless homicide at homicide, recklessness — compare careless