Function: adjective
Synonyms: IMPERCEPTIBLE , impalpable, imponderable, inappreciable, indiscernible, insensible, intangible, unapparent, unappreciable, unobservable
Function: adjective
Synonyms: IMPERCEPTIBLE , impalpable, imponderable, inappreciable, indiscernible, insensible, intangible, unapparent, unappreciable, unobservable
Merriam Webster. Collegiate thesaurus English dictionary. Английский энциклопедический толковый словарь тезауруса. 2012