Inattentive to duty; careless; neglectful; indifferent.
source: Webster 1913
adjective satellite
marked by defiant disregard for danger or consequences
Foolhardy enough to try to seize the gun from the hijacker. Became the fiercest and most reckless of partisans. A reckless driver. A rash attempt to climb Mount Everest.
source: WordNet 3.0
characterized by careless unconcern
The heedless generosity and the spasmodic extravagance of persons used to large fortunes. Reckless squandering of public funds.
