vaporous
va-por-ous
adjective
Lacking substance, clarity, or reality; vague and insubstantial.
"His arguments were vaporous and unconvincing."
adjective
Consisting of or resembling vapour; misty or gaseous in nature.
"The vaporous mist hung low over the fields."
Thesaurus
Synonyms: gauzy, see-through, diaphanous, vapourous, filmy, transparent, gauze-like, cobwebby, sheer, thin, gossamer, gaseous