I've just learned a word forbear which means to abstain from something or refrain from something. It was fine until that point, but the moment I learned the meaning of forbearance, I was confused because it had tolerance as its synonym. When forbearance is used to mean tolerance, is it implied that enforcement is what is abstained from? Then, why did it happen? Why did it become to also mean tolerance, not just abstaining from something?
Forbearance has two meanings. One is tolerance and the other is restraint. For example:
Her unfailing courtesy and forbearance under provocation
Her unfailing courtesy and self-control under provocation
The two meanings are very close. You tolerate something by restraining yourself from doing what your mind is telling you to do. It's self control. You restrain from something for the same reason.