The word "bet" refers to the act of risking something of value, often money, on the outcome of a future event, typically a game, race, or other competitive situation. When you place a bet, you are making a prediction and agreeing to pay a certain amount if your prediction is incorrect, while winning a certain amount if you are correct.
The word "bet" originated in the late 19th century, derived from the earlier term "betting," which relates to applying a wager in a game or sport. The precise origin is unclear, but it is believed to have roots in the Dutch word "bette" (meaning to place a wager) and the Old French "better" (to wager).