ameliorated
Lessened the severity
Ameliorated is the past tense of ameliorate, meaning to make or become better, especially regarding conditions or situations that were problematic: The new policies ameliorated working conditions at the factory.
The word carries a formal tone and typically describes gradual improvement rather than dramatic transformation: Her symptoms ameliorated after treatment.
bettered
Exceeded or improved upon
- enhancedIncreased in quality
- improvedMade superior to before
- alleviatedMade less severe
mitigated · remedied · rectified · relieved · eased · lessened · softened · tempered · moderated · reduced
change in condition/quality
amelioratedworsened
Declined in quality
exacerbated · aggravated · deteriorated · degraded · declined
ameliorate, amelioration, ameliorating, ameliorates, ameliorative