The antonyms for the word "un-tangling" would be "entangling," "complicating," and "confusing." When something is un-tangled, it means it has been untwisted, uncoiled or unravelled, and made straight or clear. On the opposite side of the spectrum, entangling refers to something that is being twisted, knotted, or complicated. Complicating means making something more difficult or intricate, while confusing means making it hard to understand. These antonyms are useful in expressing the opposite of un-tangling and can be used in various contexts to convey a different meaning.