wors ‧ en /ˈwɜːs ə n $ ˈwɜːr-/ BrE AmE verb [intransitive and transitive]
to become worse or make something worse OPP improve ⇨ deteriorate :
A lot of teachers expect the situation to worsen over the next few years.
Interfering now could worsen the problem.
—worsening adjective :
We are now faced with a worsening economic recession.