What are the opposite words for substantial?

Antonyms of the word "substantial" include a variety of terms that represent the opposite or contrary meaning. Some examples include flimsy, fragile, insubstantial, minimal, minor, insignificant, trivial, light, petty, and immaterial. These words signify smallness, weakness, and insignificance, instead of something being meaningful, weighty, or influential. For instance, when we use the term insubstantial, we imply a lack of importance, substance or validity. Minimal and petty words suggest that something is of no significant value. Identifying appropriate antonyms for a given word helps enhance our understanding of language and enrich our communication abilities.

Antonym of the day

were one back
aid, discourage, dissuade.