push the envelope

Etymology
From +  +  (compare ), referring to the boundary line on a graph of an aircraft’s capabilities, especially those of altitude and speed. The term was popularized by the book The Right Stuff (1979) by the American author and journalist (1930–2018) about the pilots engaged in United States postwar research with experimental rocket-powered, high-speed aircraft, and the first  astronauts selected for the National Aeronautics and Space Administration’s human spaceflight program.

Verb

 * 1)  To go beyond established limits; to pioneer.

Translations

 * Finnish: koetella rajoja, rikkoa rajoja
 * French:
 * German: bis an die Grenze gehen
 * Irish: iomairí nua a threabhadh
 * Polish: jechać po bandzie
 * Swedish: tänja på gränserna