guarantee Antonyms

potential risk repudiate rejection reject refute refusal proscription prohibition prevention opposition interdiction restraint restriction bearing false testimony backtrack on back away from the pledge take the fifth break a promise backball bearing false witness blow out of the water veto uncertainty impediment hindrance contradict challenge block barrier bar banning ban balderdash attack apprehension controvert denial hesitation forbidding embargo disqualification disprove discouragement disapproval disallowance disagreement deny anxiety