The word untwists can be defined as to undo or straighten out something that is twisted. Antonyms for untwists are words that have the opposite meaning, which would indicate the act of twisting, coiling, or curling something up. Some antonyms for untwists include twist, coil, curl, twirl, wind, and spiral. These words can be used to describe actions like coiling up a rope, twisting a wire, curling hair, or spiral staircase. It is important to understand synonyms and antonyms for a particular word to enhance one's vocabulary and improve their written and spoken communication skills.