Answer: foolproof
AnswerCrossword Clue
FOOLPROOFNever-failing: Colloq.
foolproofIncapable of going wrong or being misused
foolproofinfallible; guaranteed not to cause damage or injury if misused
FOOLPROOFRisk-free
FOOLPROOFCan't-miss
FOOLPROOFSure to work
FOOLPROOFUnfailing
FOOLPROOFGuaranteed against failure
FOOLPROOFLeaving no opportunity for error
FOOLPROOFSafe.
FOOLPROOFLike a surefire plan
FOOLPROOFWhat Truman wants the disarmament system to be.
FOOLPROOFAlways effective
FOOLPROOFInfallible
FOOLPROOFInfallible, as a scheme
FOOLPROOFGuaranteed
FOOLPROOFStupid logician's presentation?
FOOLPROOFImpervious to incompetence
FOOLPROOFLike a perfect plan