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Verb: worsen  wur-sun
  1. Grow worse
    "Conditions in the slum worsened";
    - decline
     
  2. Make worse
    "This drug worsens the pain";
    - aggravate, exacerbate, exasperate

Derived forms: worsened, worsening, worsens

Type of: alter, change, change state, modify, turn