worsen
1. [ verb ] grow worse
Synonyms: decline
Examples:

"Conditions in the slum worsened"

Related terms: better change_state suffer slip deteriorate sicken lose deprive turn_down regress inflame fail tumble decline deterioration
2. [ verb ] make worse
Synonyms: aggravate exacerbate exasperate
Examples:

"This drug aggravates the pain"

Related terms: better change inflame irritate degrade aggravation
Similar spelling:   worsened
  worsening
  worrisome