down·turn 
/ˈdaʊnˌtɚn/ noun
plural down·turns /ˈdaʊnˌtɚn/ noun [count] : a situation in which something (such as business or economic activity) decreases or becomes worse — usually singular ▪ an economic downturn = a downturn in the economy ▪ There's been a downturn in the housing market.
