词根lud,lus = to play（游戏，扮演）
来自拉丁语的luder(=to paly)意为to laugh,to play。
1.allude [对某事发笑al<ad(=to)+lud(=laugh, play)]
vi. to +sth 暗指；间接提到
allusion n.暗指
allusive adj. 暗指的
Her drooping eyes allude to her profound fatigue. 她双眼低垂，说明她非常疲倦。
2.collusion [一起笑col<com(=together)+lus(=laugh, play)]
n.同谋，勾结
collude v. 同谋
collusive adj.同谋的
The airlines are sometimes thought to be guilty of collusion in ticket pricing. 有时航空公司会被指责相互串通垄断机票价格。
3.delude [由于可笑而使某人脱离正常状态de(=from)+lud(=laugh,play)]
vt. 欺骗；哄骗；迷惑
delusion n. 迷惑，欺瞒；错觉
deIusive adj. 欺骗的；妄想的
He deludes himself that he is handsome. 他自欺地认为自己长得很帅。
4.elude [笑着从危险状况中摆脱出来e<ex(=out)+lud(=laugh．piay)]
vt.（巧妙地）逃脱，摆脱
elusive adj.逃避的
elusion n. 回避；选跑
The criminal eluded the cops by stealing a car and driving away. 犯人躲开警察偷了一辆车逃跑了。
5.illusion [头脑对某事物闹着玩il<in(=on)+lus(=laugh,play)]
n.幻想；错觉；假象
illusionist n. 魔术师；空想家
illusiva/illusory adj.幻影的；错觉的；迷惑人的
Many old maids hold the illusion of perfect marriage well into their fifties. 许多老处女在五十岁以后仍然幻想着拥有完美的婚姻。
6.ludicrous
adj.滑稽的，可笑的 *lud(=laugh)
7.prelude
n.前奏曲；序幕 v.作为...的前奏（或序幕）*pre(=before),lud(=play)
8.interlude
n.间奏；（话剧或歌剧等的）幕间；穿插事件 *inter(=between),lud(=play)
interludes of bright weather 坏天气中间或有的晴天。
9.postiude
n.后奏曲 *
10.disllusion
n.幻灭；觉醒 v.使幻灭；使醒悟（幻想破灭）《dis- = away》