insubstantiality

Noun
  1. Lack of solid substance and strength (synset 105048749)
    is a type of: weakness - the property of lacking physical or mental strength; liability to failure under pressure or stress or strain
  2. Lacking substance or reality (synset 104769070)
    is a type of: immateriality, incorporeality - the quality of not being physical; not consisting of matter
    subtypes: smoke - something with no concrete substance

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