Bedeutung von “downhill” — Learner’s Dictionary

downhill

adverb us uk /ˌdaʊnˈhɪl/

towards the bottom of a hill or slope:

It's so much easier cycling downhill.
go downhill

to gradually become worse:

After his wife died, his health started to go downhill.

(Definition von “downhill adverb” aus dem Cambridge Learner's Dictionary © Cambridge University Press)