What is the antonym of trisect?

The direct antonym of trisect, meaning to divide into three equal parts, is unify.

While "unify" doesn't directly refer to the opposite of dividing into three parts, it embodies the opposite concept of bringing together and making whole.

Other words that could be considered antonyms depending on the context include:

* Combine

* Merge

* Integrate

* Conjoin

* Whole

Let me know if you'd like more examples!