determined , brave and unwilling ever to admit defeat
发音
例句
1. Most of successful men have the characteristics of contumacy and doughty. 绝大多数成功人士都有共同的特质:脾气倔强,性格刚强。 2. The doughty old man battled his illness with fierce determination. 坚强的老人用巨大毅力与疾病作斗争。