Dictionary

unsubstantial

adjective un·sub·stan·tial \ˌən-səb-ˈstan(t)-shəl\

Definition of UNSUBSTANTIAL

:  not substantial :  lacking substance, firmness, or strength <unsubstantial shadows>
un·sub·stan·ti·al·i·ty \-ˌstan(t)-shē-ˈa-lə-tē\ noun
un·sub·stan·tial·ly \ˌən-səb-ˈstan(t)-sh(ə-)lē\ adverb
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First Known Use of UNSUBSTANTIAL

15th century

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