The phrase "more gyral" refers to something that has more curves or twists. Synonyms for this phrase include "more convoluted," "more twisted," and "more coiled." These words describe an object or idea that is intricately intertwined and complex. Other synonyms include "more sinuous," "more meandering," and "more labyrinthine." These words invoke images of winding paths and intricate patterns that are difficult to decipher. Overall, these terms convey ideas of complexity, sophistication, and depth. If you want to describe something that is more gyral, choose one of these synonyms to effectively communicate your meaning.