mid-14c., "hazardous" (also "occurring by chance," late 14c.), from Old French aventuros "chance, accidental, fortuitous;" of persons, "devoted to adventure" (Modern French aventureux), from aventure (see adventure (n.)). Sense evolution is through "rash, risk-taking" (c. 1400), "daring, fond of adventure" (mid-15c.).
1. This isn't highfalutin art-about-art. It's marvellous and adventurous stuff.
2. He had always wanted an adventurous life in the tropics.
3. The menu could have been more adventurous.
4. For the more adventurous tourists, there are trips into the mountains with a local guide.
5. I think I'll try the snails for lunch — I'm feeling adventurous today.