warn off . tell to keep away令…回避；叫…走开
He warns everybody off who tries to be friendly with his girlfriend．他不许任何人跟他女友亲近。
The road was closed to traffic after the accident，and the police were warning everyone off．事故发生后，道路被封锁，不准通行，警察正通知人们此路不通。
wash out . remove by washing洗掉
Can you tell me how I can wash out these stains? 你能告诉我怎样洗掉这些污迹吗?
This stain didn't wash out．这个污迹洗不掉。
wash out .demolish by the action of water 冲掉；冲毁
The embankment was washed out by the storm．路堤被暴雨冲毁了。
wash out . spoil by the action of rain，因雨等受影响
Bad weather has washed the game out．天气不好影响了比赛。
Today's football match has been washed out by a sudden downpour．今天的足球赛因突然下了一场大雨而取消了。
wash out . fail to qualify or continue；be eliminated被淘汰；没有及格
He was washed out after one semester．他读了一个学期就被淘汰了。
wash out . deplete the strength or vitality of（usu．used in the passive voice）使累极；使精疲力尽（常用被动语态）
I feel washed out；I shall stop working．我感到累极了，我将不干了。
She is washed out after her recent illness．最近她生了一场病，身体极其虚弱。
wash out . lose color；drain off color退色；因洗涤而掉色
After the skirt had been cleaned，its bright red was washed out．这条裙子洗过以后，它那浅红色就退掉了。
wash up . clean the dishes after a meal饭后洗餐具
Have the dishes been washed up ? 餐具洗好了吗?
It is your turn to wash up today．今天该你洗碗了。
wash up . wash one's face and hands；have a wash洗手；洗脸；洗澡
She washed up before lunch．她洗一洗才吃午饭。
wash up . exhausted；finished精疲力尽；完蛋
After a day at the office I feel completely washed up．在办公室干了一天下来，我感到精疲力尽。
Henry and Julie aren't lovers any more；they've washed up．亨利和朱丽已不再相爱，他们的恋爱关系已经结束了。
wash up . carry to shore将…冲上岸
The body was washed up the following morning．尸体第二天早上给冲到了岸上。
The incoming tide washed up cargo from the wrecked ship．上涨的潮水将失事船只上的货物冲到了岸边。
waste away . lose flesh，strength or vitality日渐消瘦；日渐衰弱
Since her operation，she has simply been wasting away and may not last long．自从她动手术以来，就日渐虚弱，也许活不长了。
He is wasting away from the disease．他因病日渐瘦弱。
She has wasted away to a skeleton．她已骨瘦如柴。
After her husband died，she wasted away with grief．她丈夫死后，她在悲伤中消瘦了。
waste one's breath. waste one's words . speak pointlessly；speak or argue with no result白费唇舌
The old man is so stubborn that you'd be only wasting your breath trying to make him change his mind．那个老头子太固执，你去劝他改变主意，不过是白费口舌。
I saw that I was wasting my words；he refused to believe me．我发现我是在白费口舌，他根本不相信我。
Don't argue with Frank any longer．You are only wasting your breath trying to get him to contribute to the Red Cross．不要与弗兰克再争下去了，你要他给红十字会捐款只不过是白费口舌而已。
watch one's step . be careful not to make an error 小心；谨慎行事；留意不犯错
Watch your step，young man！If you're late for work again you will lose your job．当心，年轻人！如果你上班再迟到，你就会丢了工作。
watch one's step . be careful not to fall or stumble 小心走路；留意不要跌倒或摔跤
Watch your step；the roads are icy．当心不要摔跤，路很滑。
watch out . look out；be on guard小心；提防
You'll be cheated if you don't watch out．如果你不小心，就会上当受骗。
Watch out for cars when you cross the street．过街时要注意来往车辆。
watch over . guard for protection or safekeeping 监视；保护；看守
The farmers there use specially trained dogs to watch over their sheep at night．那儿的农民用受过特殊训练的狗在夜间看守羊群。
They were watched over by the policemen．他们由警察看守。
water down . reduce in quality or value；weaken the strength or force of something （by addition or alteration）降低质量或价值；（通过增加或删改）减弱
The teacher had to water down the course for a slow learning class．老师不得不降低课程的要求来迁就慢班的学生。
The story has been watered down．故事的生动性被冲淡了。
water down . add water to掺水以冲淡
The whisky has been watered down．那威士忌酒掺水了。
wear away . disappear gradually through wear磨损
The inscriptions on the stones have worn away．石头上的碑文已经被磨损了。
The footsteps of thousands of visitors had worn away the steps．台阶已经被成千上万参观者的脚步磨平了。
wear away . be reduced until it disappears慢慢地消失
He could feel pain again as the medicine wore away．药性消退后，他又感到疼痛了。
My patience is almost worn away by her endless complaints．她不停的抱怨已使我几乎无法忍耐了。
wear away . （of time）pass slowly；（vigour，）fade away（时间）慢慢地消逝；（精力等）衰退
Don't wear away your youth in trifles！不要虚度年华。
The long winter wore away．漫长的冬天过去了。
Being in prison for many years has wore away the prisoner's resistance．多年呆在监狱里已经把那个罪犯的反抗精神给消磨掉了。