The word "otherwise" is used to indicate that something else could happen or be true if a certain condition is not met. It can often be seen in contexts where one situation is contrasted with another that could occur if the first situation does not take place. Essentially, it signals an alternative or a different outcome.
The word "otherwise" comes from the combination of "other" and "wise," with "wise" meaning "in the manner of" or "in relation to." It traces back to Old English "oðer," meaning "other," and the suffix "-wise," which is related to manner or fashion.