He felt its presence, as insubstantial as a flurry of dust motes caught in a beam of moonlight.His alibi was insubstantial, without supporting evidence.Insubstantial means with no substance. Here are some sentences.A cloud is insubstantial, and evaporates easily.Her testimony at the trial was insubstantial, and the judge threw it out.Her plans to become rich are as insubstantial as a dream.
I was hungry because I had not eaten a meal in 10 hours, only an insubstantial snack.
unsubstantiated
Because it is insubstantial.
In an insubstantial or weak manner
See, What will a retainer do.
No, it is not a noun. Flimsy is an adjective meaning insubstantial or cheap.
this may be a fairly insubstantial answer to your question
Airiness is the quality of being light, airy, or insubstantial in quality or manner.
Grams. They are very insubstantial despite their size.
No. Pluto is too cold and has too insubstantial an atmosphere for such storms.
it means to go find someone who cares