regress
To return to a previous or less developed state; to move backward
Examples
In a meeting
“The model started to regress after we added too many variables, showing signs of overfitting.”
Over coffee
“My phone's battery life regressed significantly after the latest update.”
Why this word
decline
Regress means to return to a previous, less developed state, while decline is general worsening
worsen
Regress specifically indicates backward movement to earlier condition, while worsen is deterioration without directional implication
deteriorate
Regress emphasizes reverting to primitive or earlier state, while deteriorate is gradual breakdown
Usage tip
Essential in statistics ('regression analysis') and when describing performance degradation. Opposite of progress; implies unwanted backward movement.
Etymology
Latin regressus from regredi (to go back) from re- (back) + gradi (to step)
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Related words
diagnose
To identify the cause or nature of a problem through examination.
revamp
To give new and improved form, structure, or appearance to something.
fundamental
Forming a necessary base or core; of central importance.
deteriorate
To become progressively worse over time.
pivot
Change direction or strategy while maintaining a central focus
extrapolate
Extend known information to predict unknown outcomes