causing pain to others
In some countries, it is against the law to be cruel to animals.

to be friendly to someone
My sister and I get along pretty well.

the system of rules and conduct observed by citizens of a community or nation, enforced by the governing body of the region
You will go to jail if you break the law.

to make someone suffer for doing something wrong
If I do something wrong, my father punishes me.

규칙
rules are there to make society more fair and safe.

a way to solve or deal with a problem
I've found a solution to our lack of space problem.

그러므로
You called me retarded; thus, I must leave your house.