Answer: regression

AnswerCrossword Clue
REGRESSIONMovement backward.
regressionA return to an earlier stage of life or a supposed previous life, esp. through hypnosis or mental illness, or as a means of escaping present anxieties
regressionA return to a former or less developed state
regressionA measure of the relation between the mean value of one variable (e.g., output) and corresponding values of other variables (e.g., time and cost)
regressionprogressive decline of a manifestation of disease
regressionA lessening of the severity of a disease or its symptoms