contumacy的复数形式怎么写

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。...

contumacy的音标：contumacy的英式发音音标为：['kɒntjʊməsɪ]contumacy的美式发音音标为：['kɑntuməsi, -tju-]...

n.拒不服从，固执...