gam‧ble1 [intransitive and transitive]
to risk money or possessions on the result of something such as a card game or a race, when you do not know for certain what the result will be [↪ bet]:
Their religion forbids them to drink or gamble.
Jack loves gambling on the horses.
to do something that involves a lot of risk, and that will not succeed unless things happen the way you would like them to
They're gambling on Johnson being fit for Saturday's game.
gamble something on something
Potter gambled everything on his new play being a hit.
She was gambling that he wouldn't read it too carefully.
We can't relax our safety standards - we'd be gambling with people's lives.
—gambler noun [countable]
Stevens was a compulsive gambler.
gamble something ↔ awayphrasal verb
to lose the whole of an amount of money by gambling:
Nielsen gambled his inheritance away.