The antonyms for the word "in-mixed" are "separated", "disassociated", "untangled", and "isolated". When something is "in-mixed", it is combined, blended or mixed together. However, when something is "separated", it means it is broken apart, disconnected or distinct from something else. Similarly, "disassociated" means to remove, detach or disconnect from the previous association. "Untangled" refers to freedom from entanglement, confusion, or complexity. Finally, "isolated" indicates something that is kept apart or separated from others. Therefore, knowing the antonyms of a word helps to understand its meaning better in the context of the sentence.