Antonyms for "unknotting" include complexifying, entangling, complicating, tangling, snarling, and confusing. These antonyms describe actions or situations that involve making something more complicated or difficult to understand, rather than simplifying or resolving something as unknotting would. For example, instead of unknotting a tangled rope, someone might inadvertently tangle it further or create more knots. Similarly, instead of unknotting a complicated problem, someone might make it more complex by introducing new variables or confusing information. In short, antonyms for unknotting describe actions that undo progress or create new problems, while unknotting resolves existing ones.