dauntless

adj.无畏的；勇敢的；不屈不挠的

Those man are certainly possessed of dauntless courage. 那些都是天不怕地不怕的硬汉子。

They are all dauntless soliders. 他们都是勇敢的士兵。

Dauntless in spirit,they became steeled through hardship. 他们不屈不挠,在艰苦的生活中锻炼得更加坚强了。

With strong mind, we are dauntless and practicing hard in the torrid sun. 铁骨铮铮，我们在火辣辣的太阳下不屈不挠，认真练习。