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.