Meaning of the word "Go downhill" in English

What does "Go downhill" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

Go downhill

US /ɡoʊ ˈdaʊnˌhɪl/
UK /ɡəʊ ˈdaʊnˌhɪl/

Idiom

to decline in quality, health, or status; to worsen

Example:
After the new management took over, the company started to go downhill.
His health has been going downhill rapidly since the diagnosis.