weakness failing flaw fault defect imperfection deficiency foible frailty drawback limitation blemish inadequacy vice want lack demerit catch sin dereliction infirmity fallibility lapse bug disadvantage problem snag downside handicap pitfall impediment liability hindrance failure minus difficulty negative obstacle complication trouble nuisance detriment hitch hiccup inconvenience debit strike incommodity hurdle glitch obstruction vulnerability debility drag disability encumbrance burden impairment restriction albatross constraint barrier deterrent issue insufficiency susceptibility error check peccadillo fragility shortfall blight ill curb downfall defectiveness incompleteness underbelly unsoundness quirk instability trammel cramp hole fetter kink crimp gap millstone baggage con hangup mar consequence faultiness idiosyncrasy errancy unreliability miscarriage harm