"Wert back" is a phrase commonly used to describe the act of regressing or reverting to a previous state or condition. Some synonyms for "wert back" include regression, retrogression, relapse, backtrack, retreat, and backslide. Regression refers to a return to an earlier stage of development or a return to a previous state of being. Retrogression is similar but specifically refers to a decline or deterioration in quality. A relapse implies a setback in a person's recovery from an illness or addiction. Backtrack and retreat both describe a retreat from progress or advancement. Lastly, backslide refers to a moral decline or return to old habits or vices.