IMPERCEPTIBILITYimperceptibility · English · Reference checkedReferenceOpen English WordNet 2024oewn2024:lemma:IMPERCEPTIBILITYTier 1Ordinal191Pythagorean92Classical181Reverse241Reverse Reduction97Standard1382Final Large1382Ordinal194Reduced41Atbash551Isopsephy1402Ordinal205Abjad1148