The archaic term "didst aboutface" can be easily replaced with modern synonyms such as "turned around" or "changed direction." Other alternatives include "reversed course," "made a U-turn," "switched sides," or "retraced one's steps." These phrases are more commonly used in contemporary English and are easily understood by most people. "Didst aboutface" is an example of archaic language that is no longer in use. It is advisable to use synonyms that are more appropriate for the time and audience to ensure effective communication.