Inclined to seek out risk or danger; bold, daring, adventurous.
Example:
Kate, with her bungee jumping, free-falling, and rock climbing, had always been the most venturesome of the four.
America, perhaps with a touch of arrogance, likes to think of itself as a land of venturesome people who push fearlessly forward in all ages and in all fields, and it clearly took a venturesome spirit to mount the successful flight to the moon that ended in July 1969. In past centuries, however, the most venturesome explorers were to be found in Greece, Italy, Spain, Portugal, and Britain -- that is, the rich countries on the sea or ocean.