Envelope-pushing is a term used to describe someone who takes risks and pushes boundaries in order to achieve success. The two crossword solutions, EDGY and EXTREME, both refer to this concept of taking risks and pushing boundaries. EDGY is an adjective that means daring or bold, while EXTREME is an adjective that means going beyond the usual limits. Both words can be used to describe someone who is willing to take risks and push boundaries in order to achieve success.