The word "de-segregate" refers to the act of ending racial segregation, and its antonyms would be words that convey the opposite meaning. These could include phrases like "segregate," "apartheid," or "Jim Crow," which all describe the practice of segregating individuals based on racial or ethnic characteristics. Other antonyms for "de-segregate" might include words like "divide," "separate," or "isolate," which denote a similar intent to separate groups or individuals based on some perceived difference. In contrast, concepts like "integration," "unity," and "inclusion" could all be considered synonyms for "de-segregate," implying a desire to bring diverse groups together rather than keeping them apart.