矛 máo：spear; lance; pike，A type of ancient Chinese weapon 盾 dùn：A shield for protecting the body 自相矛盾[zì xiāng máo dùn]：oneself/each other/spear/shield，to contradict oneself 夸赞kuā zàn：praise;commend 质问 zhì wèn：query;inter pellate;question;call to account 哑口无言 yǎ kǒu w yán：Have nothing to say for oneself; be dumbfounded