too many word

When I was in the class, if I didn’t know some words, I had to look at a dictionary. Then, I found out that even one word had several definitions. For example, when I said sorry, it could use many situations. If I felt sad and sympathetic to other people, I could say I am sorry. Also, I could say it when I was feeling sad and ashamed about something that has been done. Last, if I was feeling disappointed about something and wishing you had done something different or had not done something, I could say it, too. When I just arrived here, I heard “I am sorry.” or “You are welcome.” too many times because of that. I know I will find out more word like this, and I will say more. However, I still confused that why English has too many definitions so that every international student got confused by that. I know there are no answers, and I have to say it. This is my language journal so far. While I was writing, I was thinking that I am not good at language because I have too many curious things, and there are no answers. Hmm…