The term "didst about-face" refers to the act of making a sudden change in direction or behavior. There are several synonyms for this phrase, including "changed course," "reversed direction," "altered one's path," "switched gears," "made a U-turn," and "turned around." These phrases can be used in a variety of contexts, from describing a physical change of direction to describing a sudden change in decision or approach. Whatever the situation, these synonyms help give precision and nuance to language, allowing us to communicate more effectively and expressively.