insubstantial
3 synonyms and 1 antonym for insubstantial, grouped by meaning and by how common each one is.
Adj — Without real substance; not solid, real or strong.
Synonyms
Less common
Still standard English, but they carry more weight.
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
flimsy
unsubstantial
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 →