›to risk losing money in the hope of winning a lot more money, esp. if the result of a future event happens as you hope: [I]Some people like to gamble even though the odds are against them.[M]He gambled away most of his money.›To gamble is also to do something that you think is worth doing although it might not succeed or you might lose money: [+ that clause]We’re gambling that enough people will show up at the concert to cover our expenses.gamble
/ˈgæm·bəl/n[Cusually sing]›Starting up a new business is always a gamble.gambling
/ˈgæm·blɪŋ/n[U]›Gambling in the form of state lotteries is used to raise money for education.