1. not substantial; having no foundation in fact; fanciful; insubstantial: an unsubstantial argument; unsubstantial hopes.
2. without material substance: an unsubstantial ghost.
3. lacking material substance; materially paltry: an unsubstantial dinner of bread and cheese.
4. lacking strength or solidity; flimsy: an unsubstantial wall of cardboard.
"rallyses can be unsubstantial."
"rallies can be unsubstantial."
"deaths can be unsubstantial."
"analyses can be unsubstantial."
This list can help you learn new vocabulary more quickly and be able explore other words more easily.