1. Changing for the worse
   "worried by the worsening storm"

1. Process of changing to an inferior state
   - deterioration, decline in quality, declension 
2. Changing something with the result that it becomes worse

1. Grow worse
   "Conditions in the slum worsened"
   - decline 
2. Make worse
   - aggravate, exacerbate, exasperate

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

Antonym: better, bettering

• unloading
• unlobed
• unlocated
• unlock
• unlocked
• unlogical
• unlooked-for
• unloose
• unloosen
• unlovable
• unloved
• unlovely
• unloving
• unlubricated
• unluckily
• unluckiness
• unlucky
• unmade
• unmake
• unmalicious
• unmalleability
• unmalleable
• unmalted
• unman
• unmanageable