relapse
v.
early 15c., "renounce;" 1560s, "fall into a former state," from Latin relapsus, past participle of relabi "slip back, slide back, sink back," from re- "back" (see re-) + labi "to slip" (see lapse, n.). Related: Relapsed; relapsing.
n.
mid-15c., from relapse, v..
〔李〕[re-;laps;-e] n.旧病复发； 恶化 v.复发； 沉陷 ←laps (L labi,lapsus)=to slip or fall 滑，落