n. 诉苦, 抱怨, 控诉【医】 陈诉; 病【经】 意见, 叫屈, 控告相关词组: make a complaint against

◆记忆方法一：
词根词缀记忆法：complaint n 抱怨（com全部+plaint→对全部东西抱怨）,plaint=complain，表示“抱怨”

explain/plain/plan/explanation/complain/complaint
记忆：
1. 词根plain [ plein ] 含义为“平，明白”，explain [ iks5plein ] 讲出来让人明白，vt. 解释 The man tried to explain to the police the reason for his speedy driving. 那人设法向警察解释他高速行车的原因。
2. plain [ plein ] n. 平原, 草原 adj.简单的, 明白的, 平常的 I hope some day I can visit the plain in Inner Mongolia. 希望有一天我能参观内蒙古大草原。
3. plan [ plein ] n. 计划, 设计图, 平面图 vt.计划, 设计 Christmas holiday is the time to make a plan for the new year.圣诞假期是人们制定新年计划的时节。
4. plane [ plein ] n. 飞机，平面 adj. 平的, 平面的 China purchased hundreds of planes from the EU.中国向做法买了几百架班机。
5. explanation [ 7eksplE5neiFEn ] n. 解释, 解说 The professor gave an explanation about the manned space flight in plain but vivid word.教授用简易而生动的语言讲解了载人航天飞行。
6. complain [ kEm5plein ] com-, 共同， complain, 共同来摆平，v. 抱怨, 悲叹, 控诉 What are they complaining about?他们在抱怨什么？
7. complaint [ kEm5pleint ] n. 诉苦, 抱怨, 牢骚, 委屈, 疾病 The customer’s complaint was passed on to the general manager.顾客的抱怨被传到了总经理那里。
另类阅读：
The workers complained about their low pay. Can you explain their complaint with plain words? We are planning to give them some explanations.