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v. Past participle of backslide

"I can still see the tears streaming down my father’s cheeks when I convinced him that his so-called backslidden parents, both of them Pentecostal preachers, were not being eternally tortured in the fires of hell."

backslidden    backslides    backsliding   

drop away    fall away    slip    drop-off   

apostatize    relapse    desert   

backslid    backslidden   

backslid    backslidden    backsliding   

slide    lapse    fall    revert    weaken