venture

(noun) any venturesome undertaking especially one with an uncertain outcome.

(noun) an investment that is very risky but could yield great profits. Synonyms: speculation. Example: "He knew the stock was a speculation when he bought it."

(noun) a commercial undertaking that risks a loss but promises a profit.

(verb) proceed somewhere despite the risk of possible dangers. Synonyms: embark. Example: "We ventured into the world of high-tech and bought a supercomputer."

(verb) put forward, of a guess, in spite of possible refutation. Synonyms: guess, pretend, hazard. Examples: "I am guessing that the price of real estate will rise again." "I cannot pretend to say that you are wrong."

(verb) put at risk. Synonyms: hazard, adventure, stake, jeopardize. Example: "I will stake my good reputation for this."