relapse

verb (used without object), re·lapsed, re·laps·ing.

1. to fall or slip back into a former state, practice, etc.: to relapse into silence.
2. to fall back into illness after convalescence or apparent recovery.
3. to fall back into vice, wrongdoing, or error; backslide: to relapse into heresy.

noun

4. an act or instance of relapsing.
5. a return of a disease or illness after partial recovery from it.

verb (rɪˈlæps) (intr)

1. to lapse back into a former state or condition, esp one involving bad habits
2. to become ill again after apparent recovery

noun (rɪˈlæps, ˈriːˌlæps)

3. the act or an instance of relapsing
4. the return of ill health after an apparent or partial recovery

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.).

v.

1. To regress after partial recovery from illness.
2. To slip back into bad ways; backslide.
3. To fall or slide back into a former state.

n.

1. A falling back into a former state, especially the return of symptoms following an apparent recovery.recurrence