“忌讳”和“文明礼貌”是委婉语产生的两个重要的心理基础。“忌讳”是回避不悦的事物,“礼貌”则是回避不“雅”的事物。每当一个崭新的委婉语出现,它给人以新鲜而隐晦的感觉,起到了“回避”的作用;然而,经过长期的反复使用,便随着时间的推移逐渐变得陈旧而显露,直至完全丧失其委婉功能,最后为新的委婉语所替代。了解委婉语的时代变迁对语言教学具有十分重要的意义。 “Taboo ” and “civilized courtesy ” are two important psychological bases of euphemism. “Taboo ” is to avoid unpleasant things, “courtesy ” is to avoid “Ya ” thing. Whenever a brand new euphemism emerges, it gives a fresh and subtle feeling of “evasion”; however, after repeated use for a long time, it gradually becomes obsolete and reveals as time goes by, Until it has completely lost its euphemism and finally replaced by a new euphemism. It is of great significance to understand the changing times of euphemism to language teaching.