adj.鲁莽的，有勇无谋的，莽撞的

He decided to climb the mountain alone, a rather foolhardy endeavor given the stormy weather.
他在暴风雨的天气下决定独自登山，这是一项相当冒险的举动。
It was foolhardy of her to swim in such rough seas; she could have been swept away.
她在那样狂暴的海浪中游泳是极其鲁莽的，可能会被卷走。
The young adventurer's decision to traverse the jungle without a guide seemed foolhardy.
这位年轻的冒险者决定没有向导就穿越丛林，这显得非常轻率。
Driving at such high speeds on icy roads is sheer foolhardiness.
在结冰的道路上高速驾驶纯粹是愚蠢的冒险。
Risking your life for a trivial matter is foolhardy and irresponsible.
为了一件微不足道的事情而冒生命危险是愚蠢且不负责任的。
Attempting to cross the river during flood season was a foolhardy act that endangered not only himself but also others.
在汛期尝试过河是一种危险的行为，不仅危及他自己，也危及他人。
Without proper training, it was foolhardy of him to attempt a marathon.
没有适当的训练，他尝试跑马拉松是相当冒险的。
Entering an unfamiliar territory without a map or GPS is a foolhardy decision.
在没有地图或GPS的情况下进入不熟悉的区域是一个不明智的决定。
Quitting your stable job to start a business with no backup plan is foolhardy, especially in these uncertain economic times.
在没有备选计划的情况下辞掉稳定的工作去创业，尤其是在当前经济形势不明朗的时候，这是很冒险的。
Scaling the cliff without safety gear was a foolhardy stunt that could have ended tragically.
不戴安全装备就攀爬悬崖是一个可能导致悲剧的鲁莽行为。