1. (

• foolhardy ,
• heady ,
• rash ,
• reckless

) 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"-Macaulay; "a reckless driver"; "a rash attempt to climb Mount Everest" ;

2. (

• heedless ,
• reckless

) characterized by careless unconcern; "the heedless generosity and the spasmodic extravagance of persons used to large fortunes"- Edith Wharton; "reckless squandering of public funds" ;