exploit n. 功勋，业绩
---------heroic act; daring deed; feat
Robert E. Peary won worldwide fame foe his exploits as an Arctic explorer.
fortitude n. 坚韧
-------courage in facing danger, hardship or pain; endurance; bravery; pluck; backbone; valor
The captain showed remarkable fortitude in continuing to lead his men despite a painful wound.
audacious adj. 1.勇敢的 2.无礼的
-------1. bold; fearless daring 2. too bold; insolent; impudent
Risking serious injury, the outfielder made an audacious leap against the concrete wall and caught the powerfully-hit ball.
After we had waited for about twenty minutes, an audacious freshman came along and tried to get in at the head of our line.
dauntless adj. 勇敢的
------fearless; intrepid; very brave; valiant
The frightened sailors wanted to turn back, but their dauntless leader urged them to sail on.
indomitable adj. 不屈不挠的
-----incapable of being subdued; unconquerable; invincible
Columbus had an indomitable belief that he would reach land by sailing west.
plucky adj. 勇敢的
-------courageous; brave; valiant; valorous
Though defeated, our team put up a plucky defense against their taller and huskier opponents.
rash adj. 冲动的
-----overhasty; foolhardy; reckless; impetuous; taking too much risk
When a person loses his temper, he may say or do something rash and regret in afterwards.