bet

To bet means to risk a stake—usually money—on the result of an event whose outcome is not yet known. It involves making a prediction and committing something of value to that forecast. You might hear someone say, "He bet a week's salary on the championship game," or "She bet her brother she could finish the chores first."

A bet can range from formal wagers in sportsbooks and casinos to casual agreements between friends. In each case, the core element is the mix of uncertainty and potential loss. In modern English, it has also become a conversational shortcut for strong conviction. When you say, "I bet it will rain," you are not always making a financial wager—you are usually expressing firm belief.

The word also appears in familiar idioms that widen its use. For instance, "your best bet" usually means the smartest or safest option (for example, "Your best bet is to leave early to avoid traffic"). Also, "You bet!" is a common, upbeat way to say "Certainly!" or "Absolutely!"

Whether you are navigating the risks of a literal gamble or simply stressing your belief about what will happen next, bet captures the same blend of uncertainty, confidence, and willingness to stand by a prediction.