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unsubstantial

un·sub·stan·tial

unsubstantial

 
pronunciation:
uhn sb staen shl
part of speech: adjective
definition 1: having little or no basis in fact; without foundation.
unsubstantial claims
similar words:
frail, groundless, unfounded
definition 2: without physical or material substance.
unsubstantial dreams
antonyms:
substantial
similar words:
phantom
definition 3: not strong; weak or flimsy; insubstantial.
a poorly built, unsubstantial house
antonyms:
substantial
similar words:
flimsy, fragile, tenuous
derivations: unsubstantially (adv.), unsubstantiality (n.)