" ADVENTURE (ADVE'NTURE) n.s.[French.]1. An accident; a chance; a hazard; an event of which we have no direction. The general summoned three castles that were near: one desperate of succour, and not desirous to dispute the defence, presently yielded; but two stood upon their adventure.Sir John Hayward.2. In this sense is used the phrase, at all adventures;[à l’adventure, Fr.]By chance; without any rational scheme. "
― Samuel Johnson , A Dictionary of the English Language (Complete and Unabridged in Two Volumes), Volume One