recrudescent
🇺🇸
/ˌriːkruːˈdesnt/
🇬🇧
/ˌriːkruːˈdesnt/
coming back again after it had stopped or gotten better
The recrudescent disease worried the doctors because it had returned unexpectedly.
再発病は予期せぬ形で戻ってきたため、医者たちを心配させました。