deflourish
/ˌdɛflˈuərɪʃ/Definitions
1. verb
to cease to flourish or prosper; to wither or decline
“The city’s economy began to deflourish after the factory closed.”
2. verb
to cause something to cease to flourish or prosper
“The harsh winter conditions deflourished the crops.”
3. verb
to make something less productive or less effective
“The new policy deflourished the team’s morale.”