intrepid
词根词缀：
intrepid adj. 大无畏的
in 不，无 + trepid 颤抖的 → 不颤抖 → 大无畏的
trepidant adj. 胆怯的，不安的
trepid 颤抖的 + ant …的，具有…性质的 → 胆怯的，不安的
trepidation n. 胆怯
trepid 颤抖的 + ation 行为，过程，状态，结果 → 因胆怯而颤抖 → 胆怯
数据来源：新东方英语词汇速记大全
相关例句：
LIONEL ( V.O.): Joy infuses the breast of the intrepid adventurer. At last, he is saved!
这个勇敢的冒险家心中充满了喜悦。最后，他得救了！
Morrison was certainly intrepid but there is doubt over whether he wrote all his own copy.
莫理循无疑是勇敢的，但人们一直怀疑他是否亲手撰写了其所有的文章报道。
This state is not present the western culture of Chinese culture and cultural assimilation intrepid attack in the contemporary social phenomenon caused by the perplexed!
这种状态无一不呈现着西方文化对中国文化强悍的攻势和文化同化现象在当代社会所引发的困惑！
Some intrepid individuals were still prepared to make the journey.
某些无畏的人仍然准备作此旅行。
Wasn't I on the route of those intrepid explorers, Lewis and clark?
我不是正沿着刘易斯和克拉克那些勇敢的探险者的路线吗？
He reports that a more Intrepid operative might find temporary cover behind a bookcase just Inside the doorway.
他说稍微大胆一点就可以利用门里边的书架来做暂时的掩护。