worsening

(noun) process of changing to an inferior state. Synonyms: deterioration, decline in quality, declension.

(noun) changing something with the result that it becomes worse.

(verb) grow worse. Synonyms: worsen, decline. Example: "Conditions in the slum worsened."

(verb) make worse. Synonyms: worsen, aggravate, exacerbate, exasperate. Example: "This drug aggravates the pain."

(adj) changing for the worse. Synonyms: worsening (vs. bettering). Example: "Worried by the worsening storm."