When it comes to describing the sensation of breathing in clean air, there are several synonyms that can be used instead of "freshened air". Some options include "pure air", which indicates that the air is free from impurities, pollutants or other contaminants. "Clean air" is another synonym which also connotes the absence of pollutants and dirt particles. "Refreshed air" is also an alternative term which suggests that the air has been revitalized and renewed. Additionally, "invigorating air" is a phrase that denotes a sense of energy and revitalization. Ultimately, each of these synonyms can be used interchangeably to convey the experience of breathing a renewed and revitalized atmosphere.