unfathomable 2adjectivedomain: all adjPrinceton WordNet [ver.3.1]EnglishDefinitionresembling an abyss in depth; so deep as to be unmeasurableReport errorPath to highest hypernymMorphologySynset graphExamples1.the abyssal depths of the oceanSynonymsabysmal 2resembling an abyss in depth; so deep as to be unmeasurableabyssal 2resembling an abyss in depth; so deep as to be unmeasurable