Antonyms for the word "inter-mingling" include separation, isolation, distinction, differentiation, individualization, and segregation. While inter-mingling refers to blending or mixing things together, separation entails keeping them apart. Isolation, on the other hand, means keeping or being kept away from others. Distinction relates to differences between different people or things. Differentiation refers to the process of distinguishing one thing from another. Individualization refers to emphasizing the uniqueness of something. Finally, segregation is the act of separating people based on race or other characteristics. These antonyms illustrate various ways in which things and people can remain separate from each other.