休息日的英文是 rest day、day off。
一、休息日意思相近词语
1、off day
Most people do not spend their day-off holidays happily. Here's how to make the most of your own company and have an enjoyable day off.
（大多数人都不会愉快地度过放假的休息时间。下面跟大家谈谈如何充分利用独处的时间享受愉快的休息日。）
2、holiday
There was discord among the colonies, many feeling the hardships of a few Pilgrims did not warrant a national holiday.
（在殖民地中也存在意见的分歧，不少人认为，仅仅一小撮朝圣者所经历的那些艰难困苦并不值得用一个全国节日来纪念。）
2、rest period
Employees are entitled to take a rest period of at least 15 minutes after working for 4 hours.（员工工作4个小时后有权休息至少15分钟。）
3、Weekend
I usually go hiking with my friends on weekends.（我通常在周末和朋友去远足。）
二、休息日反义词英文
1、Work day
I have a very busy work day today, with lots of meetings and deadlines to meet.
（今天我的工作日很忙，有很多会议要开，还有很多截止日期要赶。）
2、Workweek
The standard workweek in this company is 40 hours, with two days off per week.
（这个公司的标准工作周是40个小时，每周有两天休息。）
休息日英文相关例句：
1、Take at least one rest day a week, by not exercising at all or doing a cross-training activity instead.
（每周至少休息一天，并且不要进行任何的锻炼，或者以交叉训练来代替。）
2、Sometimes, like a sulky child, he would complain to the Mother about the crowds, who gave him no rest day or night.
（有时候，他像一个生气的孩子，向母亲抱怨那些人白天和晚上都不让他休息。）
3、He did not mind being disturbed by reporters on his rest day.
（没有介意在休息期间被记者骚扰。）
Don't try to ask for even one single day off, the answer is "No" .
不要试图哪怕是请一天的假，答案是“不行”。
4、Then, two weeks later, I was working late so I could take the next day off to be at the hospital for Helen's birth.
（又过了两个星期，这一天我工作到很晚，为的是把次日的事做完。因为海伦要生产，我可以到医院去看望她。）
5、She actually had to leave the office, take the rest of the day off.
（她不得不离开办公室，那天剩下的时间她请了假。）
6、The coach said he would give the players a day off if they won, and he was as good as his word.
（教练员说假如球员们赢了，他将放他们一天假，而他的话果然一点不假。）