"Venture" (15th century) is a shortened, aphetic variant of the Middle English aventure (adventure), meaning a risky undertaking, chance, or accident.  It derives from Old French aventure, ultimately originating from the Latin adventurus ("about to happen", a future participle of advenire (to come to", "to arrive").  In the 15th century, venture emerged as a shortened variant of adventure.  By the 1560s, it shifted in meaning to specifically describe a "risky undertaking," with the business context of "speculative enterprise" appearing by the 1580s.  

According to the Oxford English Dictionary (OED), venture (as a noun) first appeared in English in the Middle English period (1150-1500), with the earliest evidence dating from before 1450 in Le Morte Arthure.  It originated as a shortening of the word aventure (adventure).  The verb form also dates back to the same period, with evidence from around 1430 in the writings of John Lydgate.  Initially venture meant "fortune, chance" or "peril," later evolving into the modern sense of a risky undertaking or business enterprise.  

Character ventures (journeys/arcs) are essential in storytelling because they drive the plot, build emotional investment, and define thematic depth.  They transform characters from static figures into relatable individuals, allowing audiences to experience emotional journeys that increase memory retention by 65-70%.  Key roles include driving conflict, enabling world-building, and facilitating reader empathy.