Meaning of the word "oil and water do not mix" in English

What does "oil and water do not mix" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

oil and water do not mix

US /ɔɪl ænd ˈwɔː.tər duː nɑːt mɪks/
UK /ɔɪl ænd ˈwɔː.tə duː nɒt mɪks/
"oil and water do not mix" picture

Idiom

used to say that two people or things are very different and cannot exist together or work together successfully

Example:
Politics and friendship often oil and water do not mix.
They tried to work together, but their personalities were like oil and water.