a commercial undertaking that risks a loss but promises a profit(noun.act)
source: wordnet30
An undertaking of chance or danger; the risking of something upon an event which can not be foreseen with certainty; a hazard; a risk; a speculation.(noun)
source: webster1913
verb (v)
proceed somewhere despite the risk of possible dangers(verb.social)
Example: We ventured into the world of high-tech and bought a supercomputer.