adjective
Synonyms: imperceptible , impalpable, inponderable, inappreciable, indiscernible, insensible, intangible, unapparent, unappreciable, unperceivable
adjective
Synonyms: imperceptible , impalpable, inponderable, inappreciable, indiscernible, insensible, intangible, unapparent, unappreciable, unperceivable
Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003