1. to go back to an earlier and usually worse or less developed condition or state
Usage: third person singular present tense of retrogress

Examples

• The patient’s condition retrogresses when he stops taking his medication.
• Without proper maintenance, the building retrogresses to its former dilapidated state.
• Her reading ability retrogresses during the summer break without practice.
• The democracy retrogresses under the new authoritarian leadership.
• The student’s performance retrogresses after missing several weeks of school.
• The economy retrogresses during periods of political instability.