1) I wrote ' I love my peaceful time'. My teacher corrected it to 'restful'. What is difference?
2) It is difficult for me to make my friend who works in a different field understand about my stress related my work.
3) My family keeps asking me when I will get married.
4) He keep to refuse a second vaccine.
5) what is difference friend and peer?->
It's almost impossible to hangout with peers. 听起来自然吗？

It is hard to tell without context, because "I love my peaceful/restful time" is not a common thing to say. So they might have just been guessing what you meant.

"peaceful" means that something brings you peace. So a peaceful place/location is a place that it is easy to feel peaceful when you are in that place. Like a quiet park, or next to a pond. A peaceful time of day might be in the early morning, when everything is still quiet. Or in the evening, when you can finally relax after a busy day. So we might describe part of the day as being "peaceful", like "it was a peaceful afternoon." or "Sunday was peaceful because I had no deadlines to worry about."

But "my peaceful time" is not a common phrase. It would be more common to say things like "I love it when things are peaceful." or "I love peaceful afternoons." or "I love spending my time in peace."

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"restful" means that something allows you to rest and recover, to recuperate, to relax in a way that makes you feel more energy and less stress afterward. So it is actually more common to say that a nap or a night's sleep was "restful". But sometimes we will say that a very relaxing experience was "restful" because it felt almost as refreshing for the mind or soul, as a nap is refreshing for the body. So relaxing for a while out in nature, might be "restful". Or a week of vacation that you spent doing quietly simple things that relax you, with no big plans. That could be described as "restful".

But "my restful time" is also not a common phrase. And it sounds like a strange way to describe a nap. Or at least, that is what I would guess if I heard someone say this. So I think your teacher was just trying to guess what you meant, but the correction was not actually better.

That is the hard part about teaching a language: because sometimes if the meaning is not clear, then it can be hard to know how to correct it. So maybe that is what happened with your teacher.

Some more natural ways to use "restful" are things like, "My nap was very restful." or "I removed some clutter from my bedroom, so now the room is a lot more restful." or "I went to a weekend retreat where they did not allow cellphones. The forest and the lake were very quiet and peaceful. It allowed me to relax and it was a very restful experience."

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A peer is just someone who is your social equal, so it usually means like fellow students or fellow employees, or people who are your same age and have a similar amount of money or education. Things like that. They are comparable to you. They are in an equal place in life. So they are not older, more advanced, more educated, have seniority over you. And they are not less educated, younger, less knowledgeable, or beneath you. So a peer is someone who is about equal to you, in society.

And a 'friend' = someone that you like and trust, who you are close to, that you share things in your life with. They are sometimes peers, because it is easy to make friends with people who are the same age and have more things in common with you. But sometimes a friend is more successful or more rich or more educated or older or has a better job than you do. Or a friend can be less educated or have less status, or be younger, etc than you are. So friends are not always your social equal, but they still matter to you because friendship is more important.