fearless [ˈfɪrləs]

例句:

• People my age were fearless and full of ambition.
  来自WSJ
• Newborn calves are not afraid of tigers. -- Young people are fearless.
  初生之 犊 不畏虎.
  
• The soldiers followed their fearless leader into the battle.
  士兵们随着他们勇敢的指挥官投入战斗.
  
• The boy seems completely fearless.
  这个男孩似乎毫不畏惧.
  
• Fearless doesn't even approach it, Keary says.
  来自THETIMES
• Friends said he was "ambitious and fearless".
  来自BBC