venture

any venturesome undertaking especially one with an uncertain outcome

an investment that is very risky but could yield great profits; "he knew the stock was a speculation when he bought it"

a commercial undertaking that risks a loss but promises a profit

proceed somewhere despite the risk of possible dangers; "We ventured into the world of high-tech and bought a supercomputer"

put forward, of a guess, in spite of possible refutation; "I am guessing that the price of real estate will rise again"; "I cannot pretend to say that you are wrong"

put at risk; "I will stake my good reputation for this"