insubstantial
1 antonym for insubstantial — opposites grouped by meaning.
Adj — Without real substance; not solid, real or strong.
Antonyms
Etymology
Probably came from Middle French insubstantiel, from Latin insubstantiālis, itself formed from in- and substantiālis. By surface analysis it breaks down as in- + substantial.
Full origin of insubstantial →