Synset

marked by defiant disregard for danger or consequences
<adj.all>   freq. cnt.: 3 freq. cnt.: 2 freq. cnt.: 1

foolhardy

heady

rash

reckless

sample sentences

"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"