dauntless

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++daunt·less /ˈdɔːntləs $ ˈdɒːnt-/ adjective  CONFIDENTconfident and not easily frightened 勇敢的，无畏的 dauntless optimism 无所畏惧的乐观

Examples from the Corpus

dauntless• Fortunately, too, he had at least one dauntless and resourceful boy of school age to assist.• It is here that the dauntless cavalrymen of Ellyrion rest when they return from their long sweeps through their embattled land.• dauntless courage• But the dauntless Hugh came up those stairs, quietly keeping his vision intact.

daunt·less adjectiveChineseSyllable  

and Corpus easily not frightened confident

dauntless
daunt‧less /ˈdɔːntləs $ ˈdɒːnt-/ adjective
confident and not easily frightened:
    dauntless optimism

daunt·lessBrE /ˈdɔːntləs/ 🔊NAmE /ˈdɔːntləs/ 🔊 adjective (literary) not easily frightened or stopped from doing sth difficult 无所畏惧的；吓不倒的；勇敢的 SYN resolute