"Disunitable" refers to something that is not able to be divided or separated. However, there are several synonyms that can help convey a similar meaning. An alternative word could be "indivisible", which describes something that cannot be separated into parts. Another synonym is "inseparable", meaning incapable of being pulled apart or divided. Additionally, "undividable" highlights the idea that the item or concept cannot be split or separated. These synonyms effectively convey the concept of "disunitable" by emphasizing the inability to divide or separate, providing alternative ways to express this quality.