The word "un-twisted" refers to something that has been untangled or straightened out. Its antonyms, on the other hand, include "twisted," "coiled," "wound," "knotted," "curled," "kinked," and "bent." All of these words describe something that is not straight or untangled, but rather has been contorted, bent or coiled in some way. For example, a rope that is un-twisted is straight and uncoiled, while a rope that is twisted is coiled and bent. Similarly, hair that is un-twisted is straight, while hair that is twisted is curled or kinked.