Uncombine means to separate or disconnect. Some antonyms for uncombine are to attach, combine, connect, join, link, and unify. To attach means to join or fasten together. To combine refers to unite or merge into a single entity. To connect suggests associating or actively joining. Join describes uniting two parts into a single entity. Link refers to joining two points together. Unify is when two or more elements combine to create a homogeneous whole. All these antonyms are the opposite of uncombine and suggest bringing things together, which can lead to the creation of something new and exciting.