Foolhardy, rash (8)
I believe the answer is:
reckless
I believe this is a double definition.
'foolhardy' is the first definition.
(I know that foolhardy can be written as reckless)
'rash' is the second definition.
(rash can mean impulsive or thoughtless)
(Other definitions for reckless that I've seen before include "Imprudent, rash" , "Utterly unconcerned for the consequences" , "not responsible" , "Careless of danger, foolishly brave" , "Wildly incautious" .)