gambling
"Gambling" is a word with two closely related meanings — one very literal and one figurative. It describes the act of risking something (usually money) in the hope of gaining more, or more broadly, taking a big risk in any situation.
Gambling is when you risk your money on something uncertain — like a card game, a horse race, or a slot machine — hoping to win more money back. The key idea is that the outcome is not guaranteed, so you might win or you might lose everything you put in.
everyday language, law, entertainment · Modern, widely used
You can also use 'gambling' to describe any situation where you take a serious risk — not just with money, but with your career, relationships, or future. Imagine someone who quits a safe job to start a business — they are 'gambling' with their future. It carries the same feeling of uncertainty and possible loss.
everyday language, business · Modern, widely used · figurative