To anticipate; expect.
To forecast.
To guess beforehand.
To conjecture; assume.
A conjecture; an assumption.
To risk (something) for potential gain.
To take a risk, with the potential of a positive outcome.
To interact with equipment at a casino
To play risky games, especially casino games, for monetary gain.
A risky venture.
A bet or wager.
A significant risk, undertaken with a potential gain.