1to be in contact (with sb)
2to associate
3to interact
4to get along (well, poorly)
Examples
tā他shì是gè个hěn很nán难xiāng chǔ相处de的nán rén男人。
他是个很难相处的男人。
He is a man hard to get on with.
我跟他总是相处得很好。
I always get along well with him.
我觉得很难和他相处。
I found it difficult to get along with him.