The word "youthen" may not be very common, but it refers to a process of becoming youthful or rejuvenated. There are several other words that can be used to describe this concept, such as revitalized, renewed, restored, refreshed, reinvigorated, reenergized, rejuvenated, and regenerated. These synonyms imply a sense of vibrancy, energy, and vitality, which are often associated with youthfulness. Whether it's through physical exercise, spiritual practices, or simply taking time to rest and recharge, the idea of "youthening" is important for people of all ages. By finding ways to feel more vital and alive, we can improve our overall health and wellbeing, and live life to the fullest.