常用字根 –nounce=to speak 1.pronounce=pro-+-nounce, 发音(往前说) 2.announce=an-+-nounce, 宣布(重复字根字首+a,强调造字法则,特别地说,所以是宣布) 3.denounce=de-(down, negate)+-nounce, 谴责(说负面的话) 4.renounce=re-(back)+-nounce, 放弃(说过的话又收回)