| Subject | English | Russian |
| idiom. | enigma wrapped in obscurity | тёмна вода во облацех воздушных (e.g. • the inner mechanism of his mind is an enigma wrapped in obscurity Рина Грант) |
| idiom. | something that is wrapped in obscurity | тёмна вода во облацех воздушных (Супру) |
| gen. | something that is wrapped in obscurity | тайна, покрытая мраком (The actual source of the Egyptian language is wrapped in obscurity. hizman) |