backslide
verb
[ ˈbakslʌɪd ]
• relapse into bad ways or error.
• "there are many things that can cause slimmers to backslide"
Similar:
relapse,
lapse,
regress,
retrogress,
revert to one's bad habits,
weaken,
lose one's resolve,
give in to temptation,
go astray,
leave the straight and narrow,
go down the primrose path,
degenerate,
deteriorate,
slip,
slide,
fall off,
revert to a former state,
go downhill,
go to pot,
go to the dogs,
recidivate,