When it comes to describing movements that go in a back-and-forth, crisscross pattern, "in a zigzag" is a commonly-used phrase. However, variety is always welcome when it comes to language, which means that there are several synonyms you may use to describe zigzag-like movements. Some words you may use include diagonal, corkscrew, serpentine, tortuous, meandering, undulating, sinuous, and curved. Choosing the right term depends on the context and the level of emphasis you want to put on the twisting motion. So, next time you want to describe a winding route or a path that goes back and forth, remember that "in a zigzag" is not the only choice you have.