Hello, i can't be sure whether i got your point exactly. It seems that you want to separate the ways to call 오빠s. We korean usually define '오빠' through preposition word. Let's imagine you need to call 주원 as older brother in family, it's '친'오빠 as older brother in just friendship, it's '아는'오빠. as older brother in relationship, it's commonly '우리'오빠. And then '오빠' contains all these usages so you were confusing i think. I wish i could help you.:)

It is almost similar. I guess your question is from the difference among 'hold up', 'stand up' and 'bear'.

How r u doing brother. I'm gonna give you a answer in my opinion. The verb, '사용하다' is similar to the meaning mixing 'spend sth so that make better' in english. And the other, '쓰다' has kind of mean 'just use'. I hope you will get whatever you want

At that time, 밍밍 got to know the fact eventually. He was a eunach.