The word "shrewd" describes someone who is astute or perceptive, especially in practical matters. A shrewd person is able to make good judgments and can often assess situations effectively. This can involve being clever in business or personal dealings, using their understanding of people and circumstances to their advantage.
The word "shrewd" comes from the Middle English word "shrewed," which means "wicked" or "evil." It is thought to have evolved from the Old English "scrēaw," meaning to "cunningly judge" or "to make shrewd." Over time, the meaning shifted to refer to being sharp-minded in a practical sense.