deteriorate
US /dɪˈtɪr.i.ə.reɪt/
UK /dɪˈtɪr.i.ə.reɪt/

1.
deteriorarse, empeorar
become progressively worse
:
•
The weather conditions began to deteriorate rapidly.
Las condiciones climáticas comenzaron a deteriorarse rápidamente.
•
His health continued to deteriorate despite treatment.
Su salud continuó deteriorándose a pesar del tratamiento.