The word "whereas" is a conjunction used to introduce a contrast between two statements or situations. It can indicate how two things are different or present opposing points of view. For example, you might say, "She enjoys hiking, whereas her brother prefers to stay indoors." In this case, "whereas" highlights the difference in their preferences.
The word "whereas" comes from the Middle English term "where as," which directly translates to "in the place that" or "in which." It combines "where," meaning a location, and "as," meaning in the same manner or condition.