back·slide /-ˌslaɪd/
  (vi.)墮落,退步,背離宗教
  Back·slide v. i.   [imp. Backslid p. p. Backslidden Backslid; p. pr. & vb. n.  Backsliding.]  To slide back; to fall away; esp. to abandon gradually the faith and practice of a religion that has been professed.
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  backslide
       v : drop to a lower level, as in one's morals or standards [syn:
            lapse]
       [also: backslidden, backslid]
  Backslide
     to draw back or apostatize in matters of religion (Acts 21:21; 2
     Thess. 2:3; 1 Tim. 4:1). This may be either partial (Prov.
     14:14) or complete (Heb. 6:4-6; 10:38, 39). The apostasy may be
     both doctrinal and moral.