Hemisect, which means to cut or divide into two equal parts, has a few antonyms. Some opposite words for this term include unite, join, merge, blend, and fuse. These terms suggest the idea of bringing together two or more things to form a single entity. Some other antonyms for hemisect are connect, attach, couple, integrate, and conjoin. These words imply the idea of joining two or more things together in a way that they become closely linked or intertwined. The antonyms of hemisect mostly suggest the concept of combining, rather than dividing or separating.