huí​chūn​zuò​yòng

rejuvenation

回春作用 huí​chūn​zuò​yòng
rejuvenation
the process of making someone or something look or feel better, younger, or more vital
geological rejuvenation
the geological process where tectonic uplift or a drop in sea level causes a river to resume downward erosion, restoring youthful features to a mature landscape