Volition ultimately derives from the Latin verb velle, meaning "to will" or "to wish." (The adjective voluntary descends from the same source.) English speakers borrowed the term from French in the 17th century, using it at first to mean "an act of choosing," a meaning Herman Melville employed in Moby Dick (1851): "Almost simultaneously, with a mighty volition of ungraduated, instantaneous swiftness, the White Whale darted through the weltering sea." Melville's use comes about a century after the word had developed an additional meaning: "the power to choose." This meaning, now the word's dominant use, is found in such sentences as "Members must join of their own volition."