relapsing
/ˈriː.læps/
名词
旧病复发
She was looking quite healthy on Friday, but she had/suffered a relapse over the weekend and was taken back into hospital.
周五的时候她看上去还很健康，但到了周末病情复发，又被送回了医院。
/rɪˈlæps/
动词
（病好转后）复发；故态复萌；重新堕落
She managed to stop using drugs for a month, but then relapsed.
她坚持了1个月没有吸毒，但是接着又故态复萌。