приходить в упадок znamená v Angličtina

dilapidate [dilapidated, dilapidating, dilapidates]▼(to fall into ruin or disuse)
verb
[UK: də.ˈlæ.pə.ˌdet] [US: də.ˈlæ.pə.ˌdet]

go to pot▼(grow worse)
verb
[UK: ɡəʊ tuː pɒt] [US: ˈɡoʊ ˈtuː ˈpɑːt]