Hi Silver
I invite you to look up 'rustic' in the WR dictionary above, if you haven't already, and then let us know what you think the answer to your question most probably is.
Then we can tell you how to best to express your idea.
Hermione
Dear HG, Thanks a lot for coming here again. Now let me rephrase what I want to express.
Indeed I was having a conversation with my friend one day, he told me he didn't like to talk with those people in our group(we both are from a same group) who came from rural areas, because they have a strong accent,
rustic accent.
My knowledge to this word is limited to its Chinese meaning though I knew it for a long time, but I seldom use it. Another word following it in my notebook is bumpkin. In Chinese these two words are synonyms, so when he mentioned "rustic", I got his idea immediately.
According to him, he wanted to emphasize that he is living in the city while others who he talked to are from rural area(countryside), he is from a rich family, he is well-educated while others are not. He has a very good American accent, so he said others who don't sound like him are
rustic.
He looks down on those who are not well-educated and who don't come from a rich family. He thinks that his American accent is the best because others(in the group) have a strong accent (when they were young they don't learn English, don't know how to pronounce, but he learns English when he was young).
I don't know whether this time it would be better for you to understand, my friend. If you still have problems in understanding, please tell me.