D defs.my
Entry 1 sense Webster, 1913

Backslide

/(băk"slīd"; 277)/ · Back·slide · IPA /bˈækslˌaɪd/
01 v. i. To slide back; to fall away; esp. to abandon gradually the faith and practice of a religion that has been professed.
imp. Backslid; p. p. Backslidden; p. pr. & vb. n. Backsliding
  1. 1.
    To slide back; to fall away; esp. to abandon gradually the faith and practice of a religion that has been professed.