watertight 2adjectivedomain: all adjPrinceton WordNet [ver.3.1]EnglishDefinitionwithout flaws or loopholesReport errorPath to highest hypernymMorphologySynset graphExamples1.a watertight alibi2.an ironclad contract3.a bulletproof argumentSynonymsunassailable 3unshakable 2bulletproof 1