say it: WUR-suh-ning
worsening is a noun and adjective meaning "process of changing to an inferior state". It carries 3 recorded senses.
process of changing to an inferior state
changing something with the result that it becomes worse
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for worsening come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.